CN104631397A - Water wing preventing three-dimensional aeration facility with front-mounted side aerator - Google Patents
Water wing preventing three-dimensional aeration facility with front-mounted side aerator Download PDFInfo
- Publication number
- CN104631397A CN104631397A CN201510102536.9A CN201510102536A CN104631397A CN 104631397 A CN104631397 A CN 104631397A CN 201510102536 A CN201510102536 A CN 201510102536A CN 104631397 A CN104631397 A CN 104631397A
- Authority
- CN
- China
- Prior art keywords
- aerator
- bank
- cavity
- upstream
- lateral
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a water wing preventing three-dimensional aeration facility with a front-mounted side aerator. On the basis that three-dimensional aeration facilities of a bottom aerator and a side aerator are respectively arranged on a bottom plate and a side wall of an outlet structure, the position of the tail part of a side aeration cavity is always positioned at the upstream side of a bottom aeration cavity by virtue of a simple body form adjustment namely front-mounting the side aerator to the upstream side to achieve the aim of reducing water wing harms, avoid water flow fluctuation and building structure vibration caused by water wings, and meanwhile improve the cavitation corrosion control effect of the aeration facilities, so that the water wing preventing three-dimensional aeration facility can be well applied to the design and operation of outlet structures of water conservancy and hydropower projects.
Description
Technical field
The present invention relates to the waterproof wing novel three-dimensional air entraining facilities that a kind of lateral aerator bank in Hydraulic and Hydro-Power Engineering outlet structure escape works is preposition, be mainly used under the prerequisite meeting certain aeration effect, containment water wing occurs, and the harm of deduction and exemption water wing, meets the needs such as engineering safety.
Background technology
Hydraulic and Hydro-Power Engineering usually needs by the outlet structure escape works such as flood discharging tunnel, flood spillway, and the Current connectin and the flood that realize reservoir area and downstream river course are led off.In recent years along with the development of Hydraulic and Hydro-Power Engineering construction technique, the characteristics such as high dam, large discharge cause the high-velocity flow problem of outlet structure escape works, and especially cavitation and cavitation erosion problem is increasingly outstanding, becomes harm whole hydroelectric project safety and stable a great problem gradually.Current engineering mainly manually forces aeration thus the generation avoiding cavitation erosion by arranging air entraining facilities to realize on outlet structure escape works to the solution of the problems referred to above.Usual earlier arranges air entraining facilities on outlet structure escape works base plate, and engineering practice proves that air entraining facilities is the effective measures avoiding cavitation erosion.But calendar year 2001 ERTAN Hydroelectric ProJect No. 1 flood discharging tunnel experienced by 1843.77 hours, about 15,200,000,000 m
3after the long-time large discharge operation of/s flow, check after flood that abutment wall within the scope of about 400 meters, aerator downstream, discovery No. 2, No. 1 hole and base plate have all suffered serious cavitation erosion, abutment wall and underplate concrete are all peeled off, basement rock exposes, have more than 300 meter of abutment wall and base plate to be worn and torn in addition, local scour hole depth reaches 19 meters.By analysis, only arranging air entraining facilities at outlet structure escape works base plate can't ensure to avoid cavitation erosion completely, and while outlet structure escape works base plate arranges air entraining facilities, set up air entraining facilities on side wall is necessary.On side wall, set up air entraining facilities in ERTAN Hydroelectric ProJect No. 1 flood discharging tunnel reparation, avoid the generation again of cavitation erosion.Therefore, arrange air entraining facilities (being referred to as three-dimensional air entraining facilities) at the base plate of large-scale outlet structure escape works and side wall to define and know together in the industry simultaneously.
But three-dimensional air entraining facilities easily causes water wing, water wing is raised water surface curve and may be altered to top, flood discharging tunnel hole, or crosses abutment wall impact structure foundation thus threaten the safety of total with stable.Therefore, for the structure design of three-dimensional air entraining facilities, how to control while the abundant aeration effect of guarantee and to avoid water wing to occur, be the Focal point and difficult point problem that current designer needs solution badly.
Summary of the invention
As shown in Figure 1, conventional three-dimensional air entraining facilities is made up of end aerator (1) (channel base plate drop suddenly formed fall bank) and lateral aerator bank (2) (sudden expansion that the sudden enlargement of channel abutment wall is formed), and base plate drop is arranged on same section with side wall sudden expansion.High-velocity flow produces end cavity (3) and side cavity (4) at downstream base plate and side wall after three-dimensional air entraining facilities, by custom-designed ventilation system continuously to air feed in cavity, to reach in current aeration to reduce or remit outlet structure escape works generation cavitation destruction.Wherein, L
dfor end cavity length, L
cfor side cavity length.When jet base plate rum point (5) is positioned at the upstream of jet side wall rum point (6), namely meet formula (1):
L
c>L
d(1)
Now, the backward upper bounce-back of impinging jet base plate, goes out the water surface along side cavity splash, forms water wing.
The present invention proposes the three-dimensional air entraining facilities of the preposition waterproof wing of a kind of lateral aerator bank, its form of structure as shown in Figure 2, comprise: end aerator (1), upstream preposition expansion type lateral aerator bank (7), current form end cavity (3) and side cavity (4) after aerator, L
dfor end cavity length, L
cfor side cavity length, L
ffor the distance that lateral aerator bank retreats.It is characterized in that: arrange on the basis of end aerator and lateral aerator bank respectively at traditional outlet structure escape works base plate and side wall, by lateral aerator bank position concordantly with end aerator upstream to be moved by traditional, thus make the tail position of side cavity be positioned at the upstream of end aerated cavity all the time, even if jet side wall rum point is all the time in the upstream of jet base plate rum point, the generation of deduction and exemption water wing harm.
In Fig. 3, shown in dotted line, part is the expansion type lateral aerator bank in conventional three-dimensional air entraining facilities, and itself and end aerator are in same section.Former lateral aerator bank upstream direction moved in the present invention, displacement is L
f, form preposition expansion type lateral aerator bank (7).Now lateral aerator chamber starting point and end cavity starting point be not at same section, but upstream move L
f, side cavity length L simultaneously
csubstantially constant, side integral hollow is upstream translation thereupon, and jet and side wall rum point (6) also upstream move thereupon, and displacement is also L
f.If avoid water wing to occur, require that jet base plate rum point (5) is in the upstream of jet side wall rum point (6), namely meets formula (2):
L
c-L
f<L
d(2)
Now, do not have available side cavity upwards to alter after impinging jet to base plate and spatter, water wing is avoided.Therefore, the present invention can significantly optimize outlet structure escape works fluidised form, avoids the structural vibration of flow fluctuation and building, improves the cavitation corrosion preventing effectiveness of air entraining facilities simultaneously.
Compared with prior art, tool of the present invention has the following advantages:
(1) structural configuration is simple;
(2) water wing Be very effective is reduced or remitted;
(3) optimize outlet structure escape works flow-shape, avoid flow fluctuation;
(4) structural vibration of building and current are controlled to the destruction of abutment wall,
(5) the cavitation corrosion preventing effectiveness of air entraining facilities is improved.
The present invention is very important for the cavitation corrosion control of Hydraulic and Hydro-Power Engineering outlet structure escape works and the safe operation of engineering.The present invention makes every effort to be changed by simple structural style, thus reaches the object reducing or remitting the water wing harm caused by side direction air entraining facilities.This invention is simple for structure, and validity also obtains verification experimental verification, can under the prerequisite meeting aeration effect needed for engineering, and the generation of deduction and exemption water wing harm, the safety of final guarantee outlet structure escape works structure is with stable.
Object of the present invention, advantage and disadvantage, by for illustration and explanation for the non-limitative illustration passing through preferred embodiments below, these embodiments only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is traditional expansion type lateral aerator bank geometric parameter schematic diagram.
Fig. 2 is the preposition waterproof wing of side of the present invention bank three-dimensional air entraining facilities geometric parameter schematic diagram.
In figure: (1) represents end aerator, (2) expansion type lateral aerator bank is represented, (3) end cavity is represented, (4) side cavity is represented, (5) jet base plate rum point is represented, (6) represent jet side wall rum point, (7) represent preposition expansion type lateral aerator bank, L
dfor end cavity length, L
cfor side cavity length, L
ffor the distance that side bank retreats, t
rlfor expansion type side bank height.
Fig. 3 is the experiment photo of engineering construction example 1 scheme 1 when upper pond level is 785m.
Fig. 4 is the experiment photo of engineering construction example 1 scheme 2 when upper pond level is 785m.
Fig. 5 is the experiment photo of engineering construction example 1 scheme 3 when upper pond level is 785m.
Fig. 6 is the experiment photo of engineering construction example 1 scheme 1 when upper pond level is 805m.
Fig. 7 is the experiment photo of engineering construction example 1 scheme 2 when upper pond level is 805m.
Fig. 8 is the experiment photo of engineering construction example 1 scheme 3 when upper pond level is 805m.
Detailed description of the invention
The three-dimensional air entraining facilities of waterproof wing that a kind of lateral aerator bank of the present invention is preposition, namely arrange on the basis of end aerator and lateral aerator bank respectively at traditional outlet structure escape works base plate and side wall, by lateral aerator bank position concordantly with end aerator upstream to be moved by traditional, thus make the tail position of side cavity be positioned at the upstream of end aerated cavity all the time, even if jet side wall rum point is all the time in the upstream of jet base plate rum point, the generation of deduction and exemption water wing harm.
The three-dimensional air entraining facilities of one of the present invention, its arrangement diagram, with reference to Fig. 2, comprising: end aerator (1), upstream preposition expansion type lateral aerator bank (7), current form end cavity (3) and side cavity (4) after aerator, L
dfor end cavity length, L
cfor side cavity length, L
ffor the distance that lateral aerator bank retreats.Conventional three-dimensional air entraining facilities (see Fig. 1) lateral aerator bank (2) and end aerator (1) are positioned at same section, it are upstream moved (preposition) in the present invention, see (7) in Fig. 2.
If avoid water wing to occur, require that jet base plate rum point (5) is in the upstream of jet side wall rum point (6).Therefore, the distance L of lateral aerator bank upstream movement
fbe required to meet formula (2):
L
c-L
f<L
d(2)
This invention is on the basis of conventional three-dimensional air entraining facilities structure, preposition by lateral aerator bank, effectively reduce or remit the generation of water wing, optimize the flow-shape after outlet structure escape works aerator, avoid the structural vibration of flow fluctuation and building, improve the cavitation corrosion preventing effectiveness of air entraining facilities simultaneously.
Below in conjunction with engineering construction example, explanation is specifically made to the present invention.
No. 3, white crane beach flood discharging tunnel is made up of fall rear and energy dissipation below spillway section of entrance gate section, gentle slope section, dragon, prototype is long is 2170.00m, import is short pressure intake, regulating gate size 15.00m × 9.50m (wide × high), elevation 770.00m at the bottom of import, outlet elevation is 650.00m, and the dragon rear gradient that falls is 1:4.0, and the three-dimensional air entraining facilities arranging aerator plus side aerator at the bottom of 4 roads carries out air mixing corrosion reducing.The fall horizontal range at tail starting point place and vertical distance of first air entraining facilities distance dragon is respectively 78.87m and 12.30m.In former design scheme, the end aerator of per pass air entraining facilities and lateral aerator bank are all positioned on same section, in running, because lateral aerator cavity and end cavity do not mate, always produce water wing to a certain degree after causing air entraining facilities, there is more serious potential safety hazard.
The each characteristic level of water of engineering is, level of dead water: 765.00m; Normal pool level: 825.00m; Design flood level: 827.83m; Check flood level: 832.34m; Flood control: 785.00m.
The present embodiment carries out air mixing corrosion reducing test according to above-mentioned flood discharging tunnel arrangement form and physical dimension design 1:40 guide physical model, under identical inlet flow conditions, only change dragon to fall the position of rear first air entraining facilities lateral aerator bank, by studying corresponding water wing characteristic, verify validity of the present invention.
In above-mentioned model, upstream move different distance L by the lateral aerator bank of the rear first air entraining facilities that fallen by dragon
f, thus devise scheme 1, scheme 2 and scheme 3.Scheme 1 adopts conventional three-dimensional air entraining facilities form of structure, namely lateral aerator bank and end aerator is arranged on same section; Scheme 2 and scheme 3 are keeping, under the prerequisite that other shape parameters are constant, lateral aerator bank being moved 0.8m and 1.6m (i.e. L respectively to upstream
f1=0m, L
f2=0.8m, L
f3=1.6m).The side bank bank height t of scheme 1, scheme 2 and scheme 3
rlbe 0.35m.Experiment obtains the prototype water wing height of scheme 1, scheme 2 and scheme 3 when upstream reservoir level is 785m and 805m, length data is as shown in table 1, and as shown in figures 3-8, in figure, oval marks place is the water wing of generation to the fluidised form photo of its correspondence.
Table 1
Can be obtained by table 1, when upstream reservoir level is 785m and 805m, the water wing height of scheme 1 is respectively 2.4m and 2m, and water wing length is respectively 26.4m and 21.6m, much larger than water wing height 1.2m and 0.8m that scheme 2 is corresponding under same inlet flow conditions, and water wing length 15.2m and 12.0m; And all there is not water wing when upper pond level is 785m and 805m in scheme 3.Scheme 1 in comparison diagram 3-8,2,3 fluidised forms corresponding to identical inlet flow conditions, also can obtain similar answer, namely upstream retreat suitable distance by lateral aerator bank, can effectively reduce water wing size, even make it disappear completely.Embodiment one proves, the present invention effectively can reduce or remit the generation of water wing, optimizes flow-shape, thus avoids flow fluctuation and the structural vibration of building, improves the cavitation corrosion preventing effectiveness of air entraining facilities, ensures the safety of engineering and stablizes.
Claims (2)
1. the three-dimensional air entraining facilities of waterproof wing that a lateral aerator bank is preposition, comprise: end aerator, upstream preposition expansion type lateral aerator bank, current form end cavity and side cavity after aerator, it is characterized in that: arrange on the basis of end aerator and lateral aerator bank respectively at traditional outlet structure escape works base plate and side wall, by lateral aerator bank position concordantly with end aerator upstream to be moved by traditional, thus make the tail position of side cavity be positioned at the upstream of end aerated cavity all the time, even if jet side wall rum point is all the time in the upstream of jet base plate rum point.
2. the three-dimensional air entraining facilities of the waterproof wing that a kind of lateral aerator bank according to claim 1 is preposition, it is characterized in that: described end cavity, side cavity, the distance that lateral aerator bank retreats meets following formula
L
c-L
f<L
d
In formula: L
dfor end cavity length, L
cfor side cavity length, L
ffor the distance that lateral aerator bank retreats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102536.9A CN104631397B (en) | 2015-03-09 | 2015-03-09 | The three-dimensional air entraining facilities of waterproof wing that a kind of side aerator is preposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102536.9A CN104631397B (en) | 2015-03-09 | 2015-03-09 | The three-dimensional air entraining facilities of waterproof wing that a kind of side aerator is preposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104631397A true CN104631397A (en) | 2015-05-20 |
| CN104631397B CN104631397B (en) | 2016-05-04 |
Family
ID=53210598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510102536.9A Expired - Fee Related CN104631397B (en) | 2015-03-09 | 2015-03-09 | The three-dimensional air entraining facilities of waterproof wing that a kind of side aerator is preposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104631397B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273406A (en) * | 2019-08-12 | 2019-09-24 | 重庆交通大学 | A kind of three-dimensional tunneling boring side diffused air aeration bank |
| CN110424343A (en) * | 2019-07-12 | 2019-11-08 | 四川大学 | A kind of rotational flow silo flood discharging tunnel with volute chamber aerated bank |
| CN111877277A (en) * | 2020-07-16 | 2020-11-03 | 四川大学 | Radial gate aeration structure with side wall impact rebound low-pressure area suddenly expanding and falling |
| CN113718727A (en) * | 2021-09-07 | 2021-11-30 | 中国电建集团昆明勘测设计研究院有限公司 | Sudden expansion and falling sill absorption basin suitable for large single wide discharge of high water head |
| CN116043787A (en) * | 2022-12-29 | 2023-05-02 | 中国水利水电第四工程局有限公司 | Anti-seismic and anti-slip multilayer sluice structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131494C1 (en) * | 1995-11-03 | 1999-06-10 | Акционерное общество Красноярский проектно-изыскательский институт "Гидропроект" | Spillway works |
| CN104195997A (en) * | 2014-07-11 | 2014-12-10 | 四川大学 | Aerated flip bucket arrangement structure suitable for high water head flood discharge hole |
-
2015
- 2015-03-09 CN CN201510102536.9A patent/CN104631397B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131494C1 (en) * | 1995-11-03 | 1999-06-10 | Акционерное общество Красноярский проектно-изыскательский институт "Гидропроект" | Spillway works |
| CN104195997A (en) * | 2014-07-11 | 2014-12-10 | 四川大学 | Aerated flip bucket arrangement structure suitable for high water head flood discharge hole |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424343A (en) * | 2019-07-12 | 2019-11-08 | 四川大学 | A kind of rotational flow silo flood discharging tunnel with volute chamber aerated bank |
| CN110424343B (en) * | 2019-07-12 | 2021-01-05 | 四川大学 | Swirl shaft flood discharge tunnel with volute chamber aeration ridge |
| CN110273406A (en) * | 2019-08-12 | 2019-09-24 | 重庆交通大学 | A kind of three-dimensional tunneling boring side diffused air aeration bank |
| CN110273406B (en) * | 2019-08-12 | 2021-03-30 | 重庆交通大学 | Three-dimensional full-section side diffusion aerator |
| CN111877277A (en) * | 2020-07-16 | 2020-11-03 | 四川大学 | Radial gate aeration structure with side wall impact rebound low-pressure area suddenly expanding and falling |
| CN113718727A (en) * | 2021-09-07 | 2021-11-30 | 中国电建集团昆明勘测设计研究院有限公司 | Sudden expansion and falling sill absorption basin suitable for large single wide discharge of high water head |
| CN116043787A (en) * | 2022-12-29 | 2023-05-02 | 中国水利水电第四工程局有限公司 | Anti-seismic and anti-slip multilayer sluice structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104631397B (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104631397B (en) | The three-dimensional air entraining facilities of waterproof wing that a kind of side aerator is preposition | |
| CN104234174B (en) | A kind of combined type froth breaking siphonic water-collecting well and method | |
| CN203188185U (en) | United energy dissipation structure under ultralow Froude number | |
| CN203514273U (en) | Large-incidence-angle diffusion-type drop sill underflow energy dissipation structure | |
| CN202913400U (en) | River bank spillway | |
| CN102733361A (en) | High-arch-dam flood discharge and energy dissipation structure of narrow river valley and deep tail water | |
| CN109252494B (en) | A kind of deformation type stilling pond front end energy-dissipating structure and its energy dissipating method | |
| CN104695390A (en) | Integrated super-discharge energy-dissipation flood-overflowing unit and method | |
| CN204690675U (en) | A kind of ecological dam body structure pattern | |
| US6755591B1 (en) | Liquid flow controller device | |
| CN113265991B (en) | Method for rebuilding multiple diversion tunnels into rotational flow vertical shaft flood discharge system | |
| CN104074174A (en) | Method for relieving low-temperature water environment influence of reservoir project and dam structure | |
| WO2011114156A2 (en) | Method and apparatus for generating power from current flow | |
| CN101538841B (en) | Differential trajectory jet energy dissipater in absorption basin | |
| CN109594533B (en) | Vortex chamber stilling pool | |
| Roshan et al. | Vortex study on a hydraulic model of Godar-e-Landar Dam and hydropower plant | |
| CN203755267U (en) | High arch dam flood discharge deep hole outlet structure | |
| CN208762979U (en) | Band blocks water the stilling pond or cushion pool of pier | |
| CN106120676B (en) | A kind of dam body table pore structure of High Concrete Dam | |
| CN104294802B (en) | Down stream formula step plunge pool system | |
| CN111931276B (en) | Method for rapidly optimizing body type of threshold-falling stilling pool | |
| CN109629534A (en) | A kind of underflow energy dissipator being arranged in tortuous channel | |
| CN204370385U (en) | A kind of shallow top layer submersible submerged jets energy-dissipating structure | |
| CN111945682A (en) | Energy dissipation pool with inverted triangular wedge tail pier | |
| CN209760351U (en) | Trestle type water supply pump station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20200309 |