CN1028661C - Eddy-eliminating orifice dissipater - Google Patents
Eddy-eliminating orifice dissipater Download PDFInfo
- Publication number
- CN1028661C CN1028661C CN 93107799 CN93107799A CN1028661C CN 1028661 C CN1028661 C CN 1028661C CN 93107799 CN93107799 CN 93107799 CN 93107799 A CN93107799 A CN 93107799A CN 1028661 C CN1028661 C CN 1028661C
- Authority
- CN
- China
- Prior art keywords
- dissipater
- orifice
- eddy
- eliminating
- gable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Hydraulic Turbines (AREA)
Abstract
The present invention discloses an energy dissipater with an orifice plate in an eddy eliminating type. The cross section of the energy dissipater is composed of an upstream triangular part and a downstream trapezoid part, wherein the water facing side of the triangular part can be linear or curved. The energy dissipater with an orifice plate in an eddy eliminating type not only can enhance the energy dissipating rate of rapid flood passages, but also can improve the performance of cavitation and cavitation corrosion. The present invention has the advantages of simple structure, good stress condition and convenient implementation.
Description
The present invention relates to a kind of devices for dissipation of energy, specifically a kind of eddy-eliminating orifice dissipater.
In pressure type overcurrent building, orifice dissipater will be widely used with the characteristic distributions of its distinctive advantage and China's hydroelectric resources, especially under the situation in the big river course of head high flow capacity, owing to require the energy of water is just subdued, so that alleviate harm to the downstream, therefore, orifice dissipater has broad application prospects.Existing orifice dissipater is conventional type, the orifice dissipater structure as depicted in figs. 1 and 2, (referring to " water conservancy journal ", o. 11th in 1988, PP.47-52) upstream face 6 of orifice dissipater and downstream face 7 all meet at right angles with flood discharging tunnel 5 hole walls, and orifice dissipater 1 cross section is have drift angle sphering radius r trapezoidal.In flood discharging tunnel 5, because the existence of orifice dissipater, make the flow section sudden change, boundary layer separation all takes place in one section flow process of incoming flow before entering orifice dissipater 1 and behind the outflow orifice energy dissipater 1, promptly there is boundary layer separation point 8, form the corner vortex in the orifice dissipater upstream, the downstream forms strong shearing vortex.The flood-discharge energy-dissipating effect depends primarily on the ratio r/d of the ratio d/D of aperture d and hole footpath D and trapezoidal drift angle sphering radius r and aperture d, d/D and (or) the r/d value is more little, the flood-discharge energy-dissipating effect is good more.Orifice dissipater 1 cavitation inception number increases, the cavitation and cavitation erosion degradation but simultaneously.When d/D, r/d value become big, though the cavitation and cavitation erosion performance of orifice dissipater 1 is improved the flood-discharge energy-dissipating deleterious.
Purpose of the present invention just provides a kind ofly can improve the cavitation and cavitation erosion performance effectively, can improve the eddy-eliminating orifice dissipater of effect of energy dissipation again.
Realization the objective of the invention is promptly to form eddy-eliminating orifice dissipater by set up the annulus that a cross section is right-angled triangle (hypotenuse is straight line or curve) in existing conventional profiled orifice plate energy dissipater's upstream.Its more excellent parameter relationship formula is:
In the formula: a is the bottom side length of gable, and b is the height of gable, and d is the aperture, and D is the footpath, hole.
That the present invention has is simple in structure, stress condition good, implement advantage easily.
Fig. 1 is the side cutaway view of known orifice dissipater.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the side cutaway view of the said eddy-eliminating orifice dissipater of the present invention.
Fig. 4 is that the A of Fig. 3 is to view.
Below in conjunction with accompanying drawing the present invention is further described.
As shown in Figure 3, the external diameter of eddy-eliminating orifice dissipater 1 promptly is footpath, hole D, and the aperture is d, and the cross section is made up of the gable 3 and the downstream trapezoid part 2 of upstream.The limit that meets water of gable 3 (being hypotenuse) can be straight line or curve, and the base is a, and height is b, and trapezoidal portions 2 upstream drift angle sphering radiuses are r.Parameter d/D, r/d value major control effect of energy dissipation, d/D, r/d value are more little, and effect of energy dissipation is good more; Parameter a/D, the major control of the b/D value whirlpool corrosion inhibitor effect that disappears.Therefore d/D, r/d value and a/D, choosing of b/D value should be made overall planning, and overlook either of the two.Gable 3 suitable baffles of eddy-eliminating orifice dissipater 1, the pressure current 4 of eddy-eliminating orifice dissipater 1 front does not take place or postpones the generation boundary layer separation in it, promptly do not occur or postpone boundary layer separation point 8 occurring, thereby eliminate or weakened the corner vortex that forms in conventional type orifice dissipater upstream, make the streamline bending more of the pressure current 4 of eddy-eliminating orifice dissipater 1 front, increased the energy exchange between hydrone, improved the flood-discharge energy-dissipating rate, improved the cavitation and cavitation erosion performance, thereupon, be the pressure current transition that the lock chamber discharge area can increase in the changeover portion of free flow, thereby can reduce the exit velocity of flood discharging tunnel 5, thereby alleviate the threat to the downstream, economic benefit and social benefit are considerable.
Claims (1)
1, a kind of eddy-eliminating orifice dissipater, it is characterized in that: setting up a cross section in the upstream of conventional type orifice dissipater is leg-of-mutton annulus, be that its cross section is made up of the gable of upstream and the trapezoidal portions with drift angle sphering radius r in downstream, the limit that meets water of gable can be straight line or curve, and the parameter relationship formula of eddy-eliminating orifice dissipater is:
(2b)/(D-d) =0.45～0.7
a/b=0.8～1.2
In the formula: a is the bottom side length of gable, and b is the height of gable, and d is the aperture of eddy-eliminating orifice dissipater, and D is the footpath, hole of eddy-eliminating orifice dissipater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93107799 CN1028661C (en) | 1993-07-08 | 1993-07-08 | Eddy-eliminating orifice dissipater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93107799 CN1028661C (en) | 1993-07-08 | 1993-07-08 | Eddy-eliminating orifice dissipater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1082647A CN1082647A (en) | 1994-02-23 |
| CN1028661C true CN1028661C (en) | 1995-05-31 |
Family
ID=4986862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93107799 Expired - Fee Related CN1028661C (en) | 1993-07-08 | 1993-07-08 | Eddy-eliminating orifice dissipater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028661C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858069B (en) * | 2010-06-23 | 2012-02-15 | 河海大学 | Method for judging flow state of throat-type energy dissipater |
| CN102011356A (en) * | 2010-11-26 | 2011-04-13 | 陈洪凯 | Curved subgrade protection structure for controlling floods and debris flow |
| CN102433863A (en) * | 2012-01-11 | 2012-05-02 | 黄河勘测规划设计有限公司 | Energy dissipation pore plate for flood discharge tunnel |
| CN102518091A (en) * | 2012-01-11 | 2012-06-27 | 黄河勘测规划设计有限公司 | Arrangement and construction method of energy dissipation orifices in flood discharging tunnel |
| CN103615625A (en) * | 2013-12-05 | 2014-03-05 | 中国核动力研究设计院 | Pore plate with ablative function and pipeline system |
| CN110616689B (en) * | 2019-09-02 | 2021-04-27 | 四川大学 | Anti-corrosion inner flow orifice plate energy dissipater |
-
1993
- 1993-07-08 CN CN 93107799 patent/CN1028661C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1082647A (en) | 1994-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109778800B (en) | Gradual change falls sill type stilling basin | |
| CN1028661C (en) | Eddy-eliminating orifice dissipater | |
| CN112343016A (en) | Combined energy dissipation structure of flood discharge tunnel | |
| CN109594533B (en) | Vortex chamber stilling pool | |
| CN2488960Y (en) | Energy dissipation and flood discharge for large dam in new type of diffusion mode | |
| CN204644955U (en) | A kind of water conservancy diversion, energy-dissipating structure being applicable to tidal waterway water drainage hinge | |
| CN109577292B (en) | Energy dissipation runner structure for reducing flow velocity | |
| CN204418136U (en) | There is pressure sudden enlargement and sudden Circular Jet energy dissipater | |
| CN107663851B (en) | Cavitation damage prevention curved stepped overflow dam | |
| CN107964928A (en) | A kind of baffle pier structure using limbers deduction and exemption cavitation erosion | |
| CN215635653U (en) | Energy dissipation return bend | |
| CN112195877B (en) | Three-partition burst-down type energy dissipation structure for inner bottom slope of gentle slope open channel | |
| CN109778802A (en) | Narrow Valleys, deep tail water, super large discharge per unit width curve gravity dam flood-discharge energy-dissipating structure | |
| CN213897030U (en) | Combined energy dissipation structure of flood discharge tunnel | |
| CN211421064U (en) | River bank spillway | |
| CN212670507U (en) | Wing section stilling pool | |
| CN220666152U (en) | Arrangement structure of vertical shaft type spillway | |
| CN109281294B (en) | Anti-arc notch cuttype overflow dam of adjustable air entrainment energy dissipation | |
| JPS6166866A (en) | Draft tube for reaction water turbine | |
| CN220953280U (en) | Opposite impact energy dissipation structure | |
| CN217078657U (en) | From aeration space diffusion flip bucket structure | |
| CN112127331A (en) | Differential reverse slope type energy dissipation aeration structure | |
| CN217781916U (en) | Overflow gravity dam structure | |
| CN207582438U (en) | A kind of varied angle chooses bank and venetian blind type stiling basin end sill combined energy dissipation structure | |
| CN221798367U (en) | Diversion drainage hole structure capable of introducing air into water body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |