CN113030165B - Rectangular experiment section for isothermal wall surface cooling experiment of high-temperature gas - Google Patents
Rectangular experiment section for isothermal wall surface cooling experiment of high-temperature gas Download PDFInfo
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- CN113030165B CN113030165B CN202110256462.XA CN202110256462A CN113030165B CN 113030165 B CN113030165 B CN 113030165B CN 202110256462 A CN202110256462 A CN 202110256462A CN 113030165 B CN113030165 B CN 113030165B
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Abstract
The invention discloses a rectangular experiment section for a high-temperature gas isothermal wall surface cooling experiment, which comprises a rectangular gas channel, a rib plate, a strut, an outer ring cavity inlet and an outer ring cavity outlet. The rectangular gas channel is formed by combining a gas channel cover plate, a gas channel U-shaped groove and a cover plate side sealing piece. The rib plates are rectangular rib plates and are uniformly welded on the outer wall surface of the rectangular gas channel. One end of the strut is provided with a groove column, the square-shaped rib plate is clamped and welded, and the other end of the strut is welded on the inner wall of the outer ring cavity. The outer ring cavity is a circular pipeline, an inlet of the outer ring cavity is arranged on the upper portion of the outer ring cavity, is close to a high-temperature gas inlet end of the rectangular gas channel and is formed by an inlet pipe and an inlet pipe flange. The outlet of the outer ring cavity is designed at the bottom of the outer ring cavity, is close to the high-temperature gas outlet end of the rectangular gas channel and consists of an outlet pipe and an outlet flange. The experimental section can be used for carrying out cooling flow heat exchange experimental research aiming at high-temperature gas in the rectangular channel under the isothermal wall surface.
Description
Technical Field
The invention relates to experimental research on the flow cooling heat exchange characteristic in a rectangular channel on an isothermal wall surface of high-temperature gas, in particular to a rectangular experimental section for a cooling experiment on the isothermal wall surface of the high-temperature gas.
Background
Ultra-high temperature gas cooled reactors, gas cooled micro-reactors and space stations carrying nuclear reactors have become an international research hotspot in recent years and an important direction for the application and development of future nuclear reactors. None of these new reactor applications use gas as a coolant and the gas is heated to high temperature and pressure conditions within the reactor core for improved energy conversion efficiency. A certain experiment is developed internationally and domestically aiming at the heating flow heat exchange experiment of high-temperature gas, and a related experiment bench is designed. However, few researchers have conducted cooling flow heat exchange experiments for high-temperature gases. However, in the ultra-high temperature gas cooled reactor, the gas cooled micro-reactor, or the space station where the nuclear reactor is installed, the high temperature gas heated by the core is cooled before flowing out of the core and then flowing into the core again, and the cooling flow heat exchange process of the high temperature gas is still an important research content.
Disclosure of Invention
In order to develop experimental study on the flow cooling heat exchange characteristic in the rectangular channel with the isothermal wall surface of the high-temperature gas, the invention aims to provide the rectangular experimental section for the cooling experiment with the isothermal wall surface of the high-temperature gas, which meets the flow heat exchange requirement and the stress strain requirement of the high-temperature gas in the rectangular channel, ensures the safety of the experimental section, and realizes experimental study on the flow cooling heat exchange characteristic of the high-temperature gas in the rectangular channel with the isothermal wall surface under a high-pressure state.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rectangular experimental section for a high-temperature gas isothermal wall surface cooling experiment comprises a gas channel cover plate 1-2, rib plates 1-3, pillars 1-4, gas channel U-shaped grooves 1-5, cover plate side sealing pieces 1-6, an outlet pipe 2-2, an outlet pipe flange 2-3, an outer annular cavity 2-4, an inlet pipe 2-6 and an inlet pipe flange 2-5; the gas channel cover plate 1-2, the gas channel U-shaped groove 1-5 and the cover plate side sealing piece 1-6 are combined to form a rectangular gas channel 1-1, and a rib plate 1-3 is sleeved outside the rectangular gas channel 1-1; a gas channel cover plate 1-2 and a gas channel U-shaped groove 1-5 which form a rectangular gas channel 1-1 are inserted into the outer ring cavity 2-4, and a ribbed plate 1-3 and a strut 1-4 are arranged; a coolant channel 2-1 is formed among the outer ring cavity 2-4, the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5; the gas inlet and outlet ends of the rectangular gas channel 1-1 support the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5 through an outer ring cavity 2-4 with two closed ends, and the middle part is welded with the inner wall of the outer ring cavity 2-4 through a rib plate 1-3 and a strut 1-4 to form a support; an outlet pipe 2-2 and an outlet pipe flange 2-3 are arranged on the upper part of the outer ring cavity 2-4 close to the high-temperature gas inlet end of the rectangular gas channel 1-1, and an inlet pipe 2-6 and an inlet pipe flange 2-5 with the same specification are arranged on the lower part of the outer ring cavity 2-4 close to the high-temperature gas outlet end of the rectangular gas channel 1-1; thereby enabling the coolant to flow in the opposite direction to the high-temperature gas, and achieving sufficient cooling.
The U-shaped groove 1-5 of the gas channel is a U-shaped high-temperature alloy steel groove with double steps at two sides, the height of the first step 1-5-1 of the U-shaped groove is the height of the rectangular gas channel 1-1, the height of the second step 1-5-2 of the U-shaped groove is the thickness of the cover plate 1-2 of the gas channel, the cover plate 1-2 of the gas channel is clamped into the second step 1-5-2 of the U-shaped groove, so that the first step 1-5-1 of the U-shaped groove can support the gas channel cover plate 1-2, and a cover plate side sealing sheet 1-6 is arranged between the cover plate 1-2 of the gas channel and the side surface of the second-level step 1-5-2 of the U-shaped groove, a rectangular gas channel 1-1 is formed by sealing, and meanwhile, the matching between the cover plate 1-2 of the gas channel and the U-shaped groove of the gas channel is strengthened.
The rib plates 1-3 are rectangular thin plates made of common steel materials and are uniformly distributed on the outer sides of the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5, and the rib plates 1-3 are nested on the outer sides of the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5 and are welded and fixed to strengthen the matching between the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5; meanwhile, the heat exchange between the high-temperature gas in the rectangular gas channel 1-1 and the coolant in the coolant channel 2-1 is strengthened.
The support columns 1-4 are solid ordinary steel cylinders and are uniformly distributed in the experimental section along the axial direction, one ends of the support columns 1-4 are provided with grooves, the groove width is the same as the thickness of the ribbed plate 1-3, the groove depth is not less than 1/3 of the rib height of the ribbed plate 1-3, and the ends clamp the ribbed plate 1-3 and are welded and fixed; the other end of the strut 1-4 is a round end and is welded on the inner wall surface of the outer ring cavity 2-4, so that the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5 are supported by the strut 1-4 and the rib plate 1-3.
The gas channel cover plate 1-2 is a high-temperature alloy steel plate, the cover plate side sealing pieces 1-6 are metal copper sheets, and the outer annular cavity 2-4 is a round pipe made of common steel and with two closed ends.
The number of the struts 1-4 along the axial direction of the experimental section is 3 to 6, and the number of the rib plates 1-3 along the axial direction of the experimental section is 15.
The invention has the following advantages and beneficial effects:
1. according to the design of the high-temperature gas isothermal wall surface cooling rectangular test section, the outer ring cavity provides a coolant flow channel, and provides force support for the gas channel cover plate and the gas channel U-shaped groove, so that thermal deformation of the rectangular gas channel is prevented. Meanwhile, the coolant enters from the lower side of one end, close to the high-temperature gas outlet, of the outer ring cavity and flows out from the upper side of one end, close to the high-temperature gas inlet, of the outer ring cavity, so that the high-temperature gas in the rectangular gas channel can be fully cooled;
2. according to the rectangular experimental section for the high-temperature gas isothermal wall surface cooling experiment, the gas channel cover plate and the outer wall surface of the U-shaped groove of the gas channel, which are combined to form the rectangular gas channel, are fastened and welded through the rib plates, so that the thermal deformation of the rectangular gas channel can be prevented, the rectangular gas channel can bear high pressure, and meanwhile, the heat exchange between the rectangular gas channel and a coolant can be strengthened;
3. according to the rectangular experiment section for the high-temperature gas isothermal wall surface cooling experiment, one end of the ribbed plate of the experiment section is clamped by one end of the strut and one end of the ribbed plate of the experiment section is welded and fixed on the inner wall surface of the outer ring cavity, so that a gas channel cover plate and a gas channel U-shaped groove which form a rectangular gas channel are supported, and the rectangular gas channel can be effectively prevented from being thermally deformed.
4. According to the rectangular experimental section for the high-temperature gas isothermal wall surface cooling experiment, only the gas channel cover plate and the gas channel U-shaped groove which form the rectangular gas channel are made of high-temperature alloy steel, and other structures are made of common steel, so that the rectangular experimental section is low in manufacturing cost and can resist high temperature and high pressure, and the requirements of engineering application are met.
Drawings
FIG. 1 is a schematic axial sectional structure diagram of a rectangular experimental section of a high-temperature gas isothermal wall surface cooling experiment of the invention;
as shown in FIG. 1, 1-1 is a rectangular gas channel, 1-2 is a gas channel cover plate, 1-3 is a rib plate, 1-4 is a strut, 1-5 is a gas channel U-shaped groove, 2-1 is a coolant channel, 2-2 is an outlet pipe, 2-3 is an outlet pipe flange, 2-4 is an outer annular cavity, 2-6 is an inlet pipe, and 2-5 is an inlet pipe flange.
FIG. 2 is a schematic cross-sectional structure diagram of a rectangular experimental section of the isothermal wall cooling experiment of high-temperature gas according to the present invention;
as shown in FIG. 2, 1-1 is a rectangular gas channel, 1-2 is a gas channel cover plate, 1-3 is a rib plate, 1-4 is a pillar, 1-5 is a gas channel U-shaped groove, 1-6 is a cover plate side sealing sheet, 2-1 is a coolant channel, 2-4 is an outer annular cavity, 2-5 is an inlet pipe, and 2-6 is an inlet pipe flange.
FIG. 3 is a schematic diagram showing a rectangular gas channel split in a rectangular experimental section of a high-temperature gas isothermal wall cooling experiment according to the present invention;
as shown in FIG. 3, 1-2 is a cover plate of a gas passage, 1-3 is a rib plate, 1-5 is a U-shaped groove of the gas passage, 1-5-1 is a first step of the U-shaped groove, 1-5-2 is a second step of the U-shaped groove, and 1-6 is a side sealing sheet of the cover plate.
Detailed Description
The invention and embodiments are explained in further detail below with reference to the drawings and the detailed design:
as shown in FIG. 1, the rectangular experimental section for the isothermal wall cooling experiment of high-temperature gas comprises gas channel cover plates 1-2, rib plates 1-3, pillars 1-4, gas channel U-shaped grooves 1-5, cover plate side sealing sheets 1-6, outlet pipes 2-2, outlet pipe flanges 2-3, outer annular cavities 2-4, inlet pipes 2-6 and inlet pipe flanges 2-5; the gas channel cover plate 1-2, the gas channel U-shaped groove 1-5 and the cover plate side sealing piece 1-6 are combined to form a rectangular gas channel 1-1, and a rib plate 1-3 is sleeved outside the rectangular gas channel 1-1; a gas channel cover plate 1-2 and a gas channel U-shaped groove 1-5 which form a rectangular gas channel 1-1 are inserted into the outer ring cavity 2-4, and a ribbed plate 1-3 and a strut 1-4 are arranged; a coolant channel 2-1 is formed among the outer ring cavity 2-4, the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5; the gas inlet and outlet ends of the rectangular gas channel 1-1 support the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5 through an outer ring cavity 2-4 with two closed ends, and the middle part is welded with the inner wall of the outer ring cavity 2-4 through a rib plate 1-3 and a strut 1-4 to form a support; an outlet pipe 2-2 and an outlet pipe flange 2-3 are arranged on the upper part of the outer ring cavity 2-4 close to the high-temperature gas inlet end of the rectangular gas channel 1-1, and an inlet pipe 2-6 and an inlet pipe flange 2-5 with the same specification are arranged on the lower part of the outer ring cavity 2-4 close to the high-temperature gas outlet end of the rectangular gas channel 1-1; thereby enabling the coolant to flow in the opposite direction to the high-temperature gas, and achieving sufficient cooling.
As a preferable and innovative implementation mode of the invention, the U-shaped groove 1-5 of the gas channel is a U-shaped high-temperature alloy steel groove with double steps on two sides, the height of the first step 1-5-1 of the U-shaped groove is the height of the rectangular gas channel 1-1, the height of the second step 1-5-2 of the U-shaped groove is the thickness of the cover plate 1-2 of the gas channel, the cover plate 1-2 of the gas channel is clamped into the second step 1-5-2 of the U-shaped groove, so that the first step 1-5-1 of the U-shaped groove can support the gas channel cover plate 1-2, and a cover plate side sealing sheet 1-6 is arranged between the cover plate 1-2 of the gas channel and the side surface of the second-level step 1-5-2 of the U-shaped groove, a rectangular gas channel 1-1 is formed by sealing, and meanwhile, the matching between the cover plate 1-2 of the gas channel and the U-shaped groove of the gas channel is strengthened.
As a preferable and innovative embodiment of the invention, the ribbed plate 1-3 is a clip-shaped thin plate made of common steel material, and is uniformly distributed on the outer sides of the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5, and the ribbed plate 1-3 is nested on the outer sides of the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5 and is welded and fixed for strengthening the matching between the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5; meanwhile, the heat exchange between the high-temperature gas in the rectangular gas channel 1-1 and the coolant in the coolant channel 2-1 is strengthened.
As a preferable and innovative embodiment of the invention, the pillars 1-4 are solid ordinary steel cylinders which are uniformly distributed in the experiment section along the axial direction, one end of each pillar 1-4 is provided with a groove, the width of the groove is the same as the thickness of the rib plate 1-3, the depth of the groove is not less than 1/3 of the rib height of the rib plate 1-3, and the end clamps the rib plate 1-3 and is welded and fixed; the other end of the strut 1-4 is a round end and is welded on the inner wall surface of the outer ring cavity 2-4, so that the gas channel cover plate 1-2 and the gas channel U-shaped groove 1-5 are supported by the strut 1-4 and the rib plate 1-3.
As a preferred and innovative implementation mode of the invention, the gas channel cover plate 1-2 is a high-temperature alloy steel plate, the side sealing piece 1-6 of the cover plate is a metal copper sheet, and the outer annular cavity 2-4 is a round pipe which is made of common steel and is closed at two ends.
As a preferred and innovative embodiment of the invention, the number of the struts 1-4 along the axial direction of the experimental section is 3 to 6, and the number of the rib plates 1-3 along the axial direction of the experimental section is 15.
Claims (4)
1. The utility model provides a high temperature gas isothermal wall face cooling experiment rectangle experiment section which characterized in that: comprises a gas channel cover plate (1-2), ribbed plates (1-3), pillars (1-4), gas channel U-shaped grooves (1-5), cover plate side sealing pieces (1-6), outlet pipes (2-2), outlet pipe flanges (2-3), an outer ring cavity (2-4), inlet pipes (2-6) and inlet pipe flanges (2-5); the gas channel cover plate (1-2), the gas channel U-shaped groove (1-5) and the cover plate side sealing piece (1-6) are combined to form a rectangular gas channel (1-1), and a rib plate (1-3) is sleeved outside the rectangular gas channel (1-1); a gas channel cover plate (1-2) and a gas channel U-shaped groove (1-5) which form a rectangular gas channel (1-1) are inserted into the outer ring cavity (2-4), and ribbed plates (1-3) and a strut (1-4) are arranged; a coolant channel (2-1) is formed among the outer ring cavity (2-4), the gas channel cover plate (1-2) and the gas channel U-shaped groove (1-5); the gas inlet and outlet ends of the rectangular gas channel (1-1) support a gas channel cover plate (1-2) and a gas channel U-shaped groove (1-5) through an outer ring cavity (2-4) with two closed ends, and the middle part is welded with a strut (1-4) and the inner wall of the outer ring cavity (2-4) through a rib plate (1-3) to form a support; an outlet pipe (2-2) and an outlet pipe flange (2-3) are arranged on the upper part of the outer ring cavity (2-4) close to the high-temperature gas inlet end of the rectangular gas channel (1-1), and an inlet pipe (2-6) and an inlet pipe flange (2-5) with the same specification are arranged on the lower part of the outer ring cavity (2-4) close to the high-temperature gas outlet end of the rectangular gas channel (1-1); thereby enabling the flowing direction of the coolant and the high-temperature gas to be opposite, and realizing sufficient cooling;
the gas channel U-shaped groove (1-5) is a U-shaped high-temperature alloy steel groove with double steps on two sides, the height of a first step (1-5-1) of the U-shaped groove is the height of a rectangular gas channel (1-1), the height of a second step (1-5-2) of the U-shaped groove is the thickness of a gas channel cover plate (1-2), the gas channel cover plate (1-2) is clamped into the second step (1-5-2) of the U-shaped groove, so that the first step (1-5-1) of the U-shaped groove can support the gas channel cover plate (1-2), a cover plate side sealing piece (1-6) is arranged between the gas channel cover plate (1-2) and the side surface of the second step (1-5-2) of the U-shaped groove, and the rectangular gas channel (1-1) is formed by sealing, meanwhile, the matching between the gas channel cover plate (1-2) and the U-shaped groove of the gas channel is strengthened;
the gas channel cover plate (1-2) is a high-temperature alloy steel plate, the side sealing pieces (1-6) of the cover plate are metal copper pieces, and the outer annular cavity (2-4) is a round pipe which is made of common steel and is closed at two ends;
the rib plates (1-3) are made of common steel, and the pillars (1-4) are made of solid common steel.
2. The rectangular experimental section for the isothermal wall cooling experiment of the high-temperature gas, according to claim 1, is characterized in that: the rib plates (1-3) are rectangular thin plates made of common steel materials and are uniformly distributed on the outer sides of the gas channel cover plates (1-2) and the gas channel U-shaped grooves (1-5), and the rib plates (1-3) are nested on the outer sides of the gas channel cover plates (1-2) and the gas channel U-shaped grooves (1-5) and are welded and fixed to strengthen the matching between the gas channel cover plates (1-2) and the gas channel U-shaped grooves (1-5); meanwhile, the heat exchange between the high-temperature gas in the rectangular gas channel (1-1) and the coolant in the coolant channel (2-1) is strengthened.
3. The rectangular experimental section for the isothermal wall cooling experiment of the high-temperature gas, according to claim 1, is characterized in that: the support columns (1-4) are solid common steel cylinders and are uniformly distributed in the experimental section along the axial direction, one ends of the support columns (1-4) are provided with grooves, the groove width is the same as the thickness of the rib plates (1-3), the groove depth is not less than 1/3 of the rib height of the rib plates (1-3), and the ends clamp the rib plates (1-3) and are welded and fixed; the other end of the strut (1-4) is a round end and is welded on the inner wall surface of the outer ring cavity (2-4), so that the gas channel cover plate (1-2) and the gas channel U-shaped groove (1-5) are supported by the strut (1-4) and the rib plate (1-3).
4. The rectangular experimental section for the isothermal wall cooling experiment of the high-temperature gas, according to claim 1, is characterized in that: the number of the struts (1-4) along the axial direction of the experimental section is 3 to 6, and the number of the rib plates (1-3) along the axial direction of the experimental section is 15.
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