WO2005042925A1 - タービン翼列構造 - Google Patents
タービン翼列構造 Download PDFInfo
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- WO2005042925A1 WO2005042925A1 PCT/JP2004/016461 JP2004016461W WO2005042925A1 WO 2005042925 A1 WO2005042925 A1 WO 2005042925A1 JP 2004016461 W JP2004016461 W JP 2004016461W WO 2005042925 A1 WO2005042925 A1 WO 2005042925A1
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- WIPO (PCT)
- Prior art keywords
- wing body
- wall surface
- cascade structure
- structure according
- wing
- Prior art date
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 63
- 239000012530 fluid Substances 0.000 claims abstract description 53
- 238000009434 installation Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 241000779819 Syncarpia glomulifera Species 0.000 claims 1
- 239000001739 pinus spp. Substances 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 229940036248 turpentine Drugs 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 23
- 230000003068 static effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 2
- RBNWAMSGVWEHFP-UHFFFAOYSA-N cis-p-Menthan-1,8-diol Natural products CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 210000001061 forehead Anatomy 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229930006948 p-menthane-3,8-diol Natural products 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- RBNWAMSGVWEHFP-WAAGHKOSSA-N terpin Chemical compound CC(C)(O)[C@H]1CC[C@@](C)(O)CC1 RBNWAMSGVWEHFP-WAAGHKOSSA-N 0.000 description 1
- 229950010257 terpin Drugs 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/145—Means for influencing boundary layers or secondary circulations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/142—Shape, i.e. outer, aerodynamic form of the blades of successive rotor or stator blade-rows
- F01D5/143—Contour of the outer or inner working fluid flow path wall, i.e. shroud or hub contour
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/914—Device to control boundary layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S416/00—Fluid reaction surfaces, i.e. impellers
- Y10S416/02—Formulas of curves
Definitions
- the present invention relates to a turbine cascade structure, and in particular, based on a secondary flow of a working fluid by improving at least one of a root part (blade root part) and a blade top part (blade tip part) of a blade body.
- the present invention relates to a turbine cascade structure for reducing secondary flow loss.
- the secondary flow loss based on this secondary flow is as large as the profile loss determined by the shape of the airfoil.
- the secondary flow is considered to occur based on the following mechanism.
- Figure 27 shows, for example, the secondary flow quoted from the literature “Basics and Practice of Gas Turbines” (Miwa, published on March 18, 1989, Sebundo Shoten, 1 1 9). It is a conceptual diagram explaining the generation mechanism.
- FIG. 27 shows a turbine nozzle as an example, and is a conceptual view seen from the trailing edge side of the wing body.
- FIG. 27 shows a cascade formed by one wing body 1a and the other adjacent wing body 1b shown in FIG. 27, and wall surfaces 3a, 3 for supporting the top and root portions of the wing bodies la, 1b.
- the working fluid for example, steam
- FIG. 27 shows a cascade formed by one wing body 1a and the other adjacent wing body 1b shown in FIG. 27, and wall surfaces 3a, 3 for supporting the top and root portions of the wing bodies la, 1b.
- centrifugal force is generated from the back side 5 of the other adjacent wing body 1 b toward the ventral side 6 of the one wing body 1 a.
- the static pressure on the ventral side 6 of one wing body l a is high.
- the back side 5 of the other adjacent wing body 1 b has a low static pressure due to the large flow velocity of the working fluid.
- a pressure gradient is generated in the flow path 4 from the ventral side 6 of one wing body 1a toward the back side 5 of the other wing body 1b.
- This pressure gradient is applied to the root side of wing body la, lb. It also occurs in the boundary layer generated on the top side.
- the boundary layer has a low flow velocity and a small centrifugal force, it cannot resist the pressure gradient from the ventral side 6 of one wing body la to the dorsal side 5 of the other wing body 1 b.
- a secondary flow of so-called working fluid that flows toward the dorsal side 5 occurs.
- a part of the so-called horseshoe vortex (horse-shoe vortex) 8 a, 8 b is generated when the working fluid collides with the leading edges 7 a, 7 b of the wing body la, lb. include.
- Horseshoe vortices 8 a and 8 b cross the flow path 4 and flow as a passage vortex 9 toward the back side 5 of the adjacent wing body 1 b and to the back side 5 of the other adjacent wing body 1 b. When it reaches, it winds up the boundary layer while interfering with the corner vortex 10. This is the so-called secondary flow vortex. This secondary flow vortex disturbed the flow of the main flow (driving fluid) and caused a reduction in cascade efficiency.
- Fig. 28 is a loss diagram obtained from the three-dimensional numerical fluid analysis showing how the secondary flow of the working fluid affects the cascade efficiency reduction.
- the vertical axis indicates the height of the wing body, and the horizontal axis indicates the total pressure.
- the so-called secondary flow that flows from the ventral side 6 of one wing body 1 a toward the dorsal side 5 of the other wing body 1 b is provided on each side of the blade root part and the blade top part. It was recognized that there was a flow.
- the effect of a rounded (round type) cusp-shaped protruding piece is also referred to, and the cusp-shaped protruding piece is used to connect the horseshoe vortex 8 a, 8 b to the wing body la, Since it has the action of moving away from the leading edges 7a and 7b of the lb, the strength of the passage vortices 9a and 9b can be reduced to reduce the cascade loss. It has been reported that the ridge line (separation line) of the protruding piece of the pipe and the stagnation point of the working fluid (the collision part of the working fluid with the front edge of the wing body) need to coincide.
- An object of the present invention is to provide a turbine cascade structure that can reduce the secondary flow loss based on the above. Disclosure of the invention
- the turbine cascade structure according to the present invention has a plurality of blades arranged in a row along the circumferential direction on the wall surface, and the working fluid flow of each blade body supported on the wall surface A covering portion extending toward the upstream side of the working fluid flow is provided at a corner portion between the front edge portion facing the wall and the wall surface.
- the covering portion is provided on at least one of the root side and the top side of the wing body.
- the covering portion can be formed as a raised portion from the upstream side toward the height direction of the leading edge of the wing body.
- the raised portion can be formed in a concave curved surface shape from the upstream installation portion toward the height direction of the front edge of the wing body.
- the bulging portion formed in the concave curved surface has a distance when the distance from the upstream installation part to the front edge of the wing body is L o and the distance from the wall surface to the height direction of the front edge is H o.
- the raised portion formed in the concave curved surface shape is formed in a fan shape extending toward the ventral side and the back side of the wing body on the basis of the stagnation point of the working fluid colliding with the front edge of the wing body. It's okay.
- the covering portion is formed as a raised portion from the upstream side toward the height direction of the leading edge of the wing body, and the covering connection piece in which the ridge portion is prepared in advance as a separate body, and the wing body and the integral It can be configured by selecting either the machined piece or the weld overlay.
- the wing body may be supported by the wall surface at least one of the root side and the top side of the wing body.
- the wing body may be supported by the wall surface at the base side thereof, and the wall surface may be formed as a straight inclined surface that descends rightward from the front edge of the wing body toward the upstream side.
- the wing body may be supported by the wall surface at the base side thereof, and the wall surface may be formed as an inclined curved surface that descends from the middle part of the wing body toward the upstream leading edge side.
- the wing body is supported by the wall surface at the base side and the top side thereof, and the wall surface is inclined downwardly from the front edge of the wing body toward the upstream side and to the upper right side. It may be formed on each of the slopes. Further, the wing body is supported by the wall surface at the base portion side and the top portion side, and the wall surface is formed into a right-down inclined curved surface and an upper-right inclined curved surface from the intermediate portion of the wing body toward the upstream leading edge side. It may be formed.
- the wing body is supported by the wall surface at the root portion side and the top portion side, and the wall surface that supports the root portion side of the wing body faces the upstream leading edge side from the intermediate portion of the wing body.
- the wall surface supporting the top side of the wing body may be formed as a straight inclined surface in the upper right direction from the front edge of the wing body toward the upstream side.
- blade body is formed flat.
- the covering portion covering the corner portion of the blade body and the wall surface is formed as a raised portion having a curved cross section, and the installation portion of the raised portion is disposed upstream.
- the surface of the curved bulge with the increased surface area is accelerated to accelerate the flow of the working fluid to suppress the generation of horseshoe vortices from the leading edge of the wing body.
- the secondary flow loss can be further reduced by reducing the strength. Therefore, the cascade structure of the present invention can be applied to, for example, turbine rotor blades and stationary blades (turbine nozzles), reducing the strength of the passage vortex caused by the working fluid flow and reducing the secondary flow loss. It can be further reduced.
- FIG. 1 is a conceptual diagram showing a first embodiment of an evening bin cascade structure according to the present invention.
- FIG. 2 is a side view of the evening bin cascade structure as seen from the direction of arrows I-II in FIG.
- FIG. 3 is a conceptual diagram showing a second embodiment of a turpin cascade structure according to the present invention.
- FIG. 4 is a side view of the turbine cascade structure as viewed from the direction of arrows IV-IV in FIG.
- FIG. 5 is a conceptual diagram showing a third embodiment of the evening bin cascade structure according to the present invention.
- FIG. 6 is a side view of the turpin cascade structure seen from the direction of arrows VI-VI in FIG. FIG.
- FIG. 7 is a conceptual diagram showing a fourth embodiment of a turbine cascade structure according to the present invention.
- Fig. 8 is a side view of the turbine cascade structure as seen from the direction of arrows VI I I-VI II in Fig. 7
- Fig. 9 is the fifth embodiment of the evening bin cascade structure according to the present invention.
- FIG. 10 is a side view of the evening pin cascade structure as viewed from the direction of arrows XX in FIG.
- FIG. 11 is a conceptual diagram showing a sixth embodiment of the evening bin cascade structure according to the present invention, and FIG. 12 is viewed from the direction of the arrow XI I-XI I in FIG.
- FIG. 3 is a side view of a turbine blade cascade structure.
- FIG. 13 is a conceptual diagram showing a seventh embodiment of a turpin cascade structure according to the present invention.
- ⁇ Fig. 14 is a turpin cascade structure as viewed from the direction of arrows XIV-XIV in Fig. 13.
- FIG. 13 is a conceptual diagram showing a seventh embodiment of a turpin cascade structure according to the present invention.
- ⁇ Fig. 14 is a turpin cascade structure as viewed from the direction of arrows XIV-XIV in Fig. 13.
- FIG. 15 is a conceptual diagram showing an eighth embodiment of the turbine cascade structure according to the present invention.
- FIG. 16 is a turbine cascade structure as seen from the direction of arrows XVI-XVI in FIG. FIG.
- FIG. 17 is a conceptual diagram showing the ninth embodiment of the evening bin cascade structure according to the present invention ( FIG. 18 is viewed from the direction of arrows XVI I I-XVI II in FIG. 17).
- FIG. 6 is a side view of a bin cascade structure.
- FIG. 19 is a conceptual diagram showing a tenth embodiment of a turbine cascade structure according to the present invention.
- FIG. 20 is a side view of the turpin cascade structure seen from the direction of arrows XX-XX in FIG. 19.
- FIG. 21 is a concept showing the first embodiment of the turpin cascade structure according to the present invention. It is a figure.
- FIG. 22 is a side view of the turbine cascade structure as viewed from the XXI ⁇ - ⁇ direction of FIG.
- FIG. 23 is a conceptual diagram showing a 12th embodiment of a turpin cascade structure according to the present invention.
- FIG. 24 is a side view of the turbine cascade structure as viewed from the direction of the arrow ⁇ -XXIV in FIG.
- FIG. 25 is a conceptual diagram showing the 13th embodiment of the turpin cascade structure according to the present invention.
- FIG. 26 is a side view of the turbine cascade structure as seen from the direction of the arrow ⁇ -XXVI in FIG.
- FIG. 27 is a conceptual diagram showing a conventional turpin cascade structure.
- FIG. 28 is a diagram showing the secondary flow loss of the conventional turbine cascade structure.
- FIG. 1 is a conceptual diagram showing a first embodiment of a turbine blade cascade structure according to the present invention using a turbine blade as an example.
- the turbine blade row structure relates to a row structure of a plurality of blades planted on a substantially flat wall surface 13 such as a turbine disk, for example, and is arranged along the circumferential direction.
- Front edge 1 at the corner (root) between the front edges 12 a, 1 2 b of the one wing body 1 1 a and the other wing body 1 lb adjacent to each other and the wall 1 3 It has a structure characterized by the provision of covering parts (fillets) 14 a, 14 b extending from 2 a, 12 b to the upstream side of the working fluid.
- the covering portions (fillets) 14 a and 14 b are provided so as to surround the front edges 12 a and 12 b of the wing bodies 11 a and ib.
- the covering portions 14 a and 14 b are installed on the upstream side of the working fluid flow on the wall surface 1 3 from the 1 5 a and 15 b to the wing body 1 1 a and the front of the lib 1 2 a, 1 2 b high
- the cross section in the vertical direction is formed as, for example, raised portions 16 a and 16 b raised in a concave curved surface, and the raised portions 16 a and 16 b are prepared separately in advance. It consists of any one of the following covering connection piece, integrally cut piece with frame lla, 1 1 b, and built-up part by welding.
- the covering parts 14 a, 14 b which are formed as ridges 16 6 a, 16 b, having a concave curved cross section, are installed from the installation parts 15 a, 15 b to the front of the wing body: 11 a, lib
- the distance to the edges 1 2 a, 1 2 b is L 0 and the distance from the wall surface 1 3 to the front edge 1 2 a, 1 2 b in the height direction is H o
- the present embodiment extends from the leading edge 1 2 &, 1 2 b of the wing body 1 1 a, 1 113 toward the upstream side of the working fluid flow, and the cross section is the leading edge 1 2 a, 1 2.
- the ridges 1 6 a, 1 413 formed as the concave curved ridges 14 a, 1 413 are used as the leading edges 1 2 of the wing bodies 1 1 &, 1 113 &, 1 2 b, which is configured to suppress the generation of horseshoe vortices by accelerating the flow of the working fluid with the covering parts 14 a, 14 b, so that the secondary flow loss is reduced by reducing the strength of the passage vortex Can be further reduced.
- FIGS. 3 and 4 are conceptual diagrams showing a second embodiment of a turbine cascade structure according to the present invention using a turbine blade as an example.
- Turbine blades according to the present embodiment are arranged in a substantially flat wall surface 13 such as a turbine disk and the like along the circumferential direction, as in the first embodiment.
- Covering portions (fillets) 14 a and 14 b extending from the edges 1 2 a and 1 2 b toward the upstream side of the working fluid flow are provided, and the covering portions 14 a and 14 b are connected to the leading edge of the blade.
- the cover portions 14 a and 14 b formed in a fan shape are respectively provided on the ventral sides 1 7 a and 17 b of the wing bodies 1 la and 1 1 b based on the stagnation point (the position where the working fluid collides with the leading edge).
- the angle 0 is set in the range of 15 ° ⁇ 0 ⁇ ⁇ 6 0 °.
- cover portions 14 a and 14 b formed in a fan shape are similar to those in the first embodiment as shown in FIG.
- the cross section of the upstream side of the wall surface 1 3 from the 1 5 a, 15 b to the front edge of the wing body 1 1 a, lib 1 2 a, 1 2 b for example, Covered connection piece, wing body 1 1 a, which is formed as ridges 16 6 a and 16 b that are raised in a concave curved surface, and these ridges 16 a and 16 b are made separately in advance.
- 1 1b Consists of one of the machined pieces and the built-up parts by welding.
- the covering portions 14 a and 14 b formed on the raised portions 16 a and 16 b having a concave curved section are formed from the stationary portions 15 a and 1513 to the wing body 11 and the same as in the first embodiment. , 1 1 b leading edge 1 2 a, 1 2 b
- the front edges 1 2 a and 1 2 b of the wing bodies 1 1 a and lib extend toward the upstream side of the working fluid flow, and the cross sections thereof are the front edges 1 2 a and 1 2 b.
- the covered parts 14 a, 14 b formed as raised parts 1 6 a, 16 b raised in a concave curved surface form the wing body 1 1 a
- the leading edge of the lib 1 2 a, 1 2 b and covering portions 14 a and 14 b are formed in a fan shape so as to cope with a wide variation in the incident angle of the working fluid to the leading edges 1 2 a and 1 2 b.
- the turbine cascade structure according to the present embodiment is applied to an evening bin rotor blade, but is not limited to this example.
- an evening pin nozzle static blade You may apply to.
- the evening bin nozzle has the wing bodies 1 la and 11 b arranged in a row along the circumferential direction on the flat wall surface 13 b and the root side such as a diaphragm outer ring provided on the top side. It is supported by a flat wall surface 13 a such as a diaphragm inner ring provided.
- the cascade structure in the present embodiment is that the front edge 1 2 &, 1 2 b of the blade body 1 1 a, 1 113 and the wall surface 13 14a 2 14 bi is provided at the corner with a, and the corner between the top side of the wing body 1 1 a, 1 1 b and the wall surface 1 3 b is formed as a fan-shaped covering 14 a 2 , 14 b 2 respectively.
- the other components and the parts corresponding thereto are the same as those in the second embodiment, and the duplicate description is omitted.
- the turbine nozzle blades 1 1 a and lib have leading edges 1 2 a and 1 2 b that extend from the root side and the top side toward the upstream side, respectively.
- leading edges 1 2 a and 1 2 b that extend from the root side and the top side toward the upstream side, respectively.
- a raised portion that is raised in the shape of a concave curve in the height direction of a, 12 b 1 6 a!
- FIG. 7 and FIG. 8 are conceptual diagrams showing a fourth embodiment of a turpin cascade structure according to the present invention using an evening bin bucket as an example.
- the turbine cascade structure according to this embodiment is similar to the first embodiment in the other cascade body adjacent to one blade body 1 1 a in the cascade structure planted on the wall surface 13 of the turbine disk or the like.
- 1 1 b with each leading edge 1 2 a, 1 2 b and the wall 1 3 at the corners (roots) extend from the leading edges 1 2 a, 1 2 b to the upstream side,
- covering parts 14 a and 1413 formed as ridges 16 a and 16 b raised in a concave curved surface in the height direction of the leading edges 1 2 a and 12 b are wing bodies 1 1 &, 1 113 is provided at the leading edge 1 2 &, 1 2 b, while the wall surface 1 3 supporting the wing body 1 1 a, 1 1 b is moved downward from the leading edge 1 2 a, 1 2 b toward the upstream side. It is formed on a linear inclined surface 19.
- the wing bodies 1 1 1 a and 1 113 extend from the front wings 12 & and 1 2 b toward the upstream side, and the cross-sections are in the height direction of the front edges 1 2 a and 1 2 b.
- the cover portions 14 a and 14 b formed as raised portions 1 6 a and 16 b that are raised in a concave curved surface shape are used as the front edge portions 12 & and 1 2 b of the wing bodies 1 1 a and 1 113, respectively.
- the wall surface 1 3 that supports the wing body 1 1 a, 1 1 b is formed on the straight inclined surface 19 that descends right from the leading edge 1 2 a, 12 b toward the upstream side, and the covering portion 14 a, 14 b and inclined surface 19 Since the flow of working fluid is accelerated and the generation of horseshoe vortices is suppressed, the passage vortex strength is weakened to further reduce the secondary flow loss. Can do.
- FIG. 9 and FIG. 10 show a turbine cascade according to the present invention using a turpin blade as an example. It is a conceptual diagram which shows 5th Embodiment of a structure. The same components as those in the first embodiment are denoted by the same reference numerals.
- the turbine blade cascade structure has one blade body 1 1 a of a blade row planted on a wall surface 13 of a turbine disk or the like 1 1 a and the other blade body 1 adjacent to the blade body 1 1 a.
- the covered parts 1 4 a, 14 b formed as raised parts 1 6 a, 16 b raised in a concave curved surface form the wing body 1 1 a , 1 113 provided on the leading edge 1 2 &, 1 2 b, while the wall surface 1 3 supporting the wing body 1 1 a, 1 1 b is located upstream from the middle part of the wing body 1 1 a, 1 1 b It is formed on the inclined curved surface 20 that descends to the right toward the 1 2 a and 1 2 b sides.
- the present embodiment extends from the leading edge 1 2 a, 1 2 b of the wing body 1 1 a, lib toward the upstream side, and the cross section extends in the height direction of the leading edge 1 2 a, 1 2 b.
- covering portions 14 a and 14 b formed as raised portions 16 a and 16 b raised in a concave curved surface are provided on the leading edge 1 2 a and 12 b of the wing body 1 1 a and lib
- the wall 1 3 supporting the wing bodies 1 1 a and 1 1 b is inclined downwardly from the middle part of the wing bodies 1 1 a and 1 1 b toward the upstream leading edge 1 2 a and 12 b. It is formed on the curved surface 20, and the flow of the working fluid is accelerated by the covering parts 14a, 14b and the inclined curved surface 20, and the generation of the horseshoe vortex is suppressed. Flow loss can be further reduced.
- FIG. 11 and FIG. 12 are conceptual diagrams showing a sixth embodiment of a turbine cascade structure according to the present invention using an evening pin rotor as an example.
- the turbine blade cascade structure is, for example, one blade body 1 1 a of the blade cascade structure planted on the wall surface 13 such as an evening disk, and the other adjacent to the other.
- the wings 1 1 b of the front wing 12 a, 1 2 b and the wall 1 3 at the corners of the wings 1 2 a, 1 2 b extend from the front edge to the upstream side, the cross section is the front edge 12 In the height direction of a, 1 2 b, for example, it is formed as raised parts 16 6 a, 16 b that are raised in a concave curved surface, and is fan-shaped with respect to the leading edges 12 a, 12 b
- the covering parts 14 a and 14 b to be formed are provided on the leading edges 1 2 a and 1 2 b of the wing bodies 1 1 a and 1 1 b, while the wall surfaces 1 3 supporting the wing bodies 1 1 a and 1 1 b are installed on the front It is formed on a straight inclined surface 19 that descends
- the wing body lla, 1 113 extends from the leading edges 1 2 &, 1 2 b toward the upstream side, and the cross section extends in the height direction of the leading edges 12 a, 12 b.
- the covering portions 14 a and 14 b that form the raised portions 1 6 a and 16 b raised in a concave curved surface shape in a fan shape are attached to the front edge 1 2 a and 1 2 b of the wing body 1 1 a and lib
- the wall surface 1 3 that supports the wing bodies 1 1 a and 1 1 b is formed on a straight inclined surface 19 that descends to the right from the leading edges 12 a and 12 b toward the upstream side.
- FIGS. 13 and 14 are conceptual diagrams showing a seventh embodiment of a turpin cascade structure according to the present invention, which is an example of an evening bin nozzle (static blade).
- the evening bin cascade structure has a wall surface 13 a such as a diaphragm outer ring provided on the top side of the evening bin nozzle and a diaphragm inner ring provided on the root side of the turpin nozzle.
- a wall surface 13 a such as a diaphragm outer ring provided on the top side of the evening bin nozzle and a diaphragm inner ring provided on the root side of the turpin nozzle.
- 1 1 a a, 1 113 b leading edge 1 2 &, 1 2 b top and root sides and wall 1 3 a, 13 b 14 a 2 , 14 b 1 ; 14 b 2 are provided at the corners of each of these.
- 14 a 14 a 2) 14 b 1 ; 14 b 2 is the upstream side from the top side and the root side of the leading edges 1 2 a and 12 b of the turbine nozzle blades 1 1 a and 1 1 b Extending in the direction of the cross section of the leading edge 1 2 a, 1 2 b in the height direction, for example, a raised portion that is raised in a concave curved shape 1 6 a 16a 2) 1 6 b l5 16 b 2
- the ridges 1 6 a 16 a 2 , 1 6 b 1, 16 b 2 are fan-shaped by coping with the wide fluctuation of the incident angle of the working fluid to the leading edges 1 2 a and 1 2 b. Yes.
- the wall surface 1 3 a on the root side is connected to the upstream side from the front wing 12 a and 1 2 b. It is formed on the inclined surface 1 9 a in a straight line downward to the right, and the wall surface 1 3 b on the top side is also a straight inclined surface on the upper right from the leading edge 1 2 a, 1 2 toward the upstream side 19 formed in b.
- the present embodiment extends from the top side and the root side of the leading edge 1 2 a and 1 2 b of the wing body 1 1 a and lib toward the upstream side. 2 a, 1 2 b
- the raised part 1 6 a 1 16 a 2 , 1 6 b 1 ; 1 6 b 2 fan-shaped covering 14 a 1 14 a 2 , 14 b 1 ; 1 4 b 2 is provided on the front edge 1 2 a, 12 b of the wing body 1 1 a, lib, and the covering part 14 a, 14 a 2 , 14 b 14 b 2 is formed in a fan shape in response to a wide variation in the incident angle to the leading edges 1 2 a and 1 2 b of the working fluid.
- the wall surface 1 3 a on the root side is turned right from the leading edge 12 a and 1 2 b toward the upstream side.
- Downward straight inclined surface 19 a is formed, and the top wall surface 13 b is formed as an upper right straight inclined surface 19 b from the leading edges 12 a and 12 b to the upstream side.
- 14a 2 , 14 b 1 ; 14 b 2 and inclined surfaces 19 a, 19 accelerate the flow of the working fluid to form the horseshoe vortex.
- the front edge 1 2 a, 1 2 b is tightened from a distance to suppress the generation of horseshoe vortices and the boundary layer is thinned, the strength of the passage vortex is weakened, and the base of the wing body 1 1 a, 1 1 b The secondary flow loss on the part side and the top part side can be further reduced.
- the wall surface 1 3 a on the root portion side is upstream from the leading edges 1 2 a and 1 2 b.
- a straight inclined surface descending to the right toward the side 19 9 a is formed, and the top wall 13 3 b is formed from the front edge 1 2 a, 1 2 b toward the upstream side to the upper right linear shape.
- the present invention is not limited to this example. As shown in FIGS.
- FIGS. 19 and 20 are conceptual diagrams showing a tenth embodiment of a turbine cascade structure according to the present invention, which is an example of an evening bin rotor blade.
- the turpin cascade structure according to the present embodiment is similar to the second embodiment, for example, the other wing body adjacent to one wing body 11a of the wing train planted on the wall surface 13 such as a turbine disk.
- leading edge 1 2 a extends from the upstream side to the upstream side, and the cross section is formed in the height direction of the leading edges 1 2 a, 1 2 b, for example, as raised portions 16 6 a, 16 b raised in a concave curved surface, And leading edge 1 2 a,
- 1 2 b fan-shaped covering parts 14 a and 14 b are provided on the front edge 1 2 a and 12 b of the wing body 1 1 a and lib, while supporting the wing bodies 1 1 1 a and 1 1 b
- the wall surface 1 3 is formed on the inclined curved surface 20 that descends from the middle part of the leading edges 1 2 &, 1 2 b of the wing body 1 la, 1 113 toward the upstream leading edges 1 2 a, 1 2 b Is.
- the present embodiment extends from the leading edges 1 2 a and 1 2 b of the wing bodies 1 1 a and lib toward the upstream side, and the cross section extends in the height direction of the leading edges 1 2 a and 1 2 b.
- the ridges 1 6 a and 14 b formed in a fan shape on the raised parts 1 6 a and 16 b raised in a concave curved surface form the wing body 1 1 a and the leading edge of the lib 1 2 a and 1 2
- the wall surface 1 3 that supports the wing bodies 1 1 a and 1 1 b is placed to the right of the upstream front edges 1 2 a and 1 2 b from the middle part of the wing bodies 1 1 a and 1 1 b.
- the turbine cascade structure which concerns on this embodiment is applied to the evening bin rotor blade, you may apply not only to this example but to a turbine nozzle (static blade).
- the evening bin nozzle is connected to the base side of the leading edges 12 a, 1 2 b of the wing bodies 1 1 a, 1 1 b and the wall surface 1 3 a 14 a 1 14 bi is formed at the corner of the blade, and the fan-shaped covering 14 a is also provided at the corner between the top side of the wing body 1 1 a, 1 1 b and the wall surface 1 3 b. 2 and 14 b 2 are provided.
- the turbine nozzle according to the present embodiment is configured so that both ends of the blade body 1 1 a, 1 l b
- the wall surface 1 3 b of the wall surfaces 1 3 a, 1 3 b on the root side and the top side for example, as shown in FIG. 2 1 and FIG. 22, between the wing bodies 1 1 a, 1 1 b It may be formed on the inclined surfaces 20 a and 20 b on the right-down and upper-right sides toward the front edge 1 2 a and 1 2 b upstream from the part. As shown in the figure, out of the wall surfaces 1 3 a and 1 3 b that support the wing bodies 1 1 a and 1 1 b, the wall surface 1 3 a on the root side is placed between the wing bodies 1 1 a and 1 1 b.
- Upstream leading edge from the part 1 2 a, 1 2 b slope toward the right It may be formed on the curved surface 20 a, and as shown in FIGS. 25 and 26, of the wall surfaces 1 3 a and 1 3 b that support the wing bodies 1 1 a and 1 1 b,
- the wall surface 1 3 a on the root side is formed on the inclined curved surface 20 a which is descending to the right from the middle part of the wing body 1 1 a, 1 1 b toward the upstream leading edge 1 2 a, 1 2 b.
- the top wall surface 13 b may be formed as a linear inclined surface 19 on the upper right from the front edges 12 a and 12 b toward the upstream side.
- the covering portion covering the corner portion between the blade body and the wall surface is formed as a raised portion having a curved cross section, and the installation portion of the raised portion is extended toward the upstream side. Since the curved surface ridge with a large surface area and a large surface area accelerates the flow of the working fluid and suppresses the generation of horseshoe vortices from the leading edge of the wing body, the strength of the passage vortex
- the cascade structure of the present invention can be applied to, for example, turbine blades and stationary blades (evening bin nozzles), and can be reduced by operating fluid flow. It is an invention that can be used industrially, for example, by reducing the strength of the passage vortex and further reducing the secondary flow loss.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/577,651 US7625181B2 (en) | 2003-10-31 | 2004-10-29 | Turbine cascade structure |
CN2004800325101A CN1875169B (zh) | 2003-10-31 | 2004-10-29 | 涡轮叶栅构造 |
EP04793381.7A EP1688586B1 (en) | 2003-10-31 | 2004-10-29 | Turbine cascade structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003373643A JP4346412B2 (ja) | 2003-10-31 | 2003-10-31 | タービン翼列装置 |
JP2003-373643 | 2003-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005042925A1 true WO2005042925A1 (ja) | 2005-05-12 |
Family
ID=34544156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016461 WO2005042925A1 (ja) | 2003-10-31 | 2004-10-29 | タービン翼列構造 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7625181B2 (ja) |
EP (1) | EP1688586B1 (ja) |
JP (1) | JP4346412B2 (ja) |
CN (1) | CN1875169B (ja) |
WO (1) | WO2005042925A1 (ja) |
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- 2004-10-29 EP EP04793381.7A patent/EP1688586B1/en not_active Expired - Lifetime
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---|---|---|---|---|
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CN101779003B (zh) * | 2008-01-21 | 2013-03-27 | 三菱重工业株式会社 | 涡轮叶栅端壁 |
US9334744B2 (en) | 2010-07-14 | 2016-05-10 | Isis Innovation Ltd | Vane assembly for an axial flow turbine |
Also Published As
Publication number | Publication date |
---|---|
EP1688586A4 (en) | 2011-11-02 |
EP1688586B1 (en) | 2013-07-03 |
EP1688586A1 (en) | 2006-08-09 |
CN1875169B (zh) | 2011-02-02 |
US20070081898A1 (en) | 2007-04-12 |
CN1875169A (zh) | 2006-12-06 |
JP2005133697A (ja) | 2005-05-26 |
US7625181B2 (en) | 2009-12-01 |
JP4346412B2 (ja) | 2009-10-21 |
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