CN107905185A - A kind of combined energy dissipater with airfoil type aerator - Google Patents
A kind of combined energy dissipater with airfoil type aerator Download PDFInfo
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- CN107905185A CN107905185A CN201710881933.XA CN201710881933A CN107905185A CN 107905185 A CN107905185 A CN 107905185A CN 201710881933 A CN201710881933 A CN 201710881933A CN 107905185 A CN107905185 A CN 107905185A
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- 238000005276 aerator Methods 0.000 title claims abstract description 96
- 238000005273 aeration Methods 0.000 claims description 20
- 238000009792 diffusion process Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 238000000889 atomisation Methods 0.000 description 7
- 230000006378 damage Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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 present invention relates to a kind of combined energy dissipater with airfoil type aerator, belong to hydraulic and hydroelectric engineering technical field.Including flaring gate pier, airfoil type aerator, Stepped Spillway, ogee section, stiling basin；Airfoil type aerator is set between flaring gate pier and Stepped Spillway；The left and right sides of airfoil type aerator is wing section, and interlude is conventional aerator section, terminates flaring gate pier before airfoil type aerator, tail end connects Stepped Spillway；Reversed segmental arc under Stepped Spillway；Stiling basin is connect under ogee section；Current, through airfoil type aerator, followed by downstream Stepped Spillway, ogee section, into stiling basin, finally flow to downstream from flaring gate pier during flood discharge.The effectively increase nearly bottom current air entrainment of Stepped Spillway of the invention, hydraulic structure cavitation corrosion cavitation is reduced to destroy, increase substantially energy dissipation rate, great improvement is brought to reservoir area Ecology bad border at the same time, so that this new Energy Dissipation Modes of integrated energy dissipater, make something perfect even more perfect, it is simple in structure, it is convenient and practical easy to construct.
Description
Technical field
The present invention relates to a kind of combined energy dissipater with airfoil type aerator, belong to hydraulic and hydroelectric engineering technical field.The back of the body
Scape technology
With the continuous improvement of modern architecture technique, high water head, large discharge per unit power station more and more appear in regarding for people
Open country, but the high-velocity flow that high water head, large discharge per unit produce, make flood discharge passage be also easy to produce the destruction of cavitation corrosion cavitation, while at a high speed
The huge energy that current are brought, not only increases the depth and length of stiling basin, increases engineering construction cost, and high-velocity flow
The high-frequency being also easy to produce during flood discharge passage, the Pressure Fluctuation of high intensity are impacted, is easily resonated with dam body and stiling basin floor
Destroy, it is huge to dam stability, and the rupture harm on stiling basin floor.A large amount of scholar and expert are just continuous both at home and abroad at present
Explore solution method.
In view of the above problems, Chinese scholar proposes flaring gate pier+Stepped Spillway+stiling basin integration efficiency work(, width is utilized
Pier is consoled to cross-direction shrinkage and the longitudinal stretching of incoming so that current are provoked in flaring gate pier exit, forms the water longitudinally to tower
Wing so that current bring large quantity of air into atmosphere, and after falling into stiling basin, water is mutually blended with gas, rotary roll, collide, and eliminate
The big energy of current.When incoming passes through ladder, vortex clockwise is produced in ladder, stronger cut not only is produced to incoming should
Power reduces water flow dynamic energy, and vortex can suck large quantity of air, and increase turbulent fluctuation dissipates, and reduces water flow dynamic energy.But due to stream
The current air entrainment deficiency on Stepped Spillway is crossed, Stepped Spillway is produced serious cavitation corrosion cavitation and destroys.To understand
Certainly this problem, engineering in flaring gate pier and Stepped Spillway junction, adds air mixing corrosion reducing facility in practice, according to different cloth
Put form, can be divided into bank formula, slope sticking type, slot type and hybrid etc., and aerator have it is simple in structure, easy to construct and venthole
The features such as arrangement, solve cavitation corrosion Cavitation Problems in engineering frequently with aerator, and due to the effect of aeration ramp, current are provoked,
Cavity, cavity both sides and atmosphere are formed between current and Stepped Spillway, therefore is had continually during sluicing
Air enter, improve the aeration concentrater on the Stepped Spillway of downstream.But in practical engineering application, due to aeration ramp body
Type design is unreasonable, and different degrees of cavitation corrosion cavitation is still remained in engineering and is destroyed, water power power station reaches 90m in discharge per unit width2/
During s, Ladder Overflow dam facing generates slight cavitation erosion, and Danjiangkou power station reaches 120m in discharge per unit width2During/s, ladder
Overfull dam surface generates serious cavitation corrosion cavitation and destroys.And since aeration ramp build is unreasonable, current are easy during aerial drainage
Atomization is produced, serious atomization is formed and destroys, therefore it is extremely urgent to inquire into rational aeration ramp build.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of combined energy dissipater with airfoil type aerator, mainly solves high
Head, large discharge per unit aeration problem, choose bank horizontal proliferation shunting function, reduce longitudinal water flow, alleviate downstream rank
Terraced overfall dam and stiling basin, energy dissipating burden, increase flood-relief channel entirety energy dissipation rate；The atomization for reducing aerial drainage generation at the same time destroys,
Increase water conservancy oxygen content, improve water quality and aquatic animals and plants living environment etc..With having the advantages of simple structure and easy realization, to choosing water
It is small to flow vertical disturbance, is not easy to aerial drainage and produces atomization, and causes the increase of aerated cavity area, aeration effect is good, is not likely to produce sky
Cavitation is lost to destroy.
The technical solution adopted by the present invention is：A kind of combined energy dissipater with airfoil type aerator, including flaring gate pier 1, machine
Aerofoil profile aerator 2, Stepped Spillway 3, ogee section 4, stiling basin 5；Machine is set between the flaring gate pier 1 and Stepped Spillway 3
Aerofoil profile aerator 2；The left and right sides of airfoil type aerator 2 is wing section 6, and interlude is conventional aerator section 7, airfoil type aeration
Flaring gate pier 1 is terminated before bank 2, tail end connects Stepped Spillway 3；Reversed segmental arc 4 under Stepped Spillway 3；Stiling basin 5 is connect under ogee section 4；
Current 8 are from flaring gate pier 1 during flood discharge, through airfoil type aerator 2, followed by downstream Stepped Spillway 3, ogee section 4, into the power that disappears
Pond 5, finally flows to downstream.
The airfoil type aerator 2 is to choose that bank front end is symmetrical to prune a part in conventional two-dimentional continuous linear type,
So that aeration ramp is changed into similar wing build from triangular prism build, 2 front end of airfoil type aerator is thin and tail end is thick, thick middle and
Both sides are thin, and the current by 2 center of airfoil type aerator to choosing in the air, and both sides current are chosen along both wings diffusion.
In the airfoil type aerator 2:L1 is conventional 7 bottom edge lengths of aerator section, and L4 is conventional aerator section 7
Upper bottom edge length, L2 are the bottom of wing section 6 edge lengths, and L3 is the length of 6 upper surface two sides wing of wing section, and B is airfoil type
The bottom of aerator 2 hem width, L5 is 6 overall width of wing section, and L6 is 2 end thickness of airfoil type aerator, and L8 is 6 end of wing section
Height and the difference in height of conventional 7 end height of aerator section, L9 are the length of 6 upper surface inclined side wing of wing section, and α is conventional
7 upper surface upper bottom edge of aerator section and the angle of side, angles of the β between 6 upper surface of wing section and horizontal plane, γ mix to be conventional
The angle of 7 side of gas bank section and 2 bottom of airfoil type aerator, δ are 6 upper surface two sides wing of wing section and airfoil type aerator
The angle of 2 bottoms, wherein α=45o ~ 180o, β=0 ~ 45o, γ=0 ~ 11.3o, δ=0o ~ 90o.
The present invention operation principle be：Chosen in conventional two-dimentional continuous linear type and symmetrical on bank prune a part of pars intermedia
It is point constant so that aeration ramp is changed into similar wing build from obtuse angle triangular prism build, 2 thick middle of airfoil type aerator and both sides
Thin, when current are by airfoil type aerator 2, center water stream to choosing in the air, and two survey current are chosen after being spread along both wings so that
The cavity area between overflow and Stepped Spillway 3 after airfoil type aerator 2 substantially increases, and makes aeration better.At the same time
Airfoil type build, passes through beneficial to current smooth-going, small to choosing the vertical disturbance of current, is not easy to aerial drainage and produces atomization.Traditional aeration
Bank is that one direction current are provoked, and only realizes that two dimension chooses stream, and the present invention realizes current due to the presence of airfoil type aerator 2
Three-dimensional chooses stream, a part of current transverse direction flip shot, and the current of horizontal flip shot and the area of air contact are much larger than longitudinal flip shot current,
Therefore aeration effect is more abundant, simultaneously because this chooses bank transverse direction shunting function, reduces longitudinal water flow, alleviates downstream rank
The energy dissipating burden of terraced overfall dam 3 and stiling basin 5, increases flood-relief channel entirety energy dissipation rate.
The beneficial effects of the invention are as follows：Simple in structure using airfoil type aerator 2, easy for construction, shunting function is obvious,
Aeration is better, effectively reduces the destruction of cavitation corrosion cavitation, helps to reduce atomization destruction, improves oxygen content of water, improve ecology
Environment.
Brief description of the drawings
Fig. 1 is the flood discharge passage integral arrangement profile of the present invention；
Fig. 2 is a kind of three-dimensional structure diagram of airfoil type aerator 2 of the present invention；
Fig. 3 chooses bank stereogram for conventional two-dimentional continuous linear type；
Fig. 4 is the top view that airfoil type aerator 2 of the present invention is installed in flood discharge passage；
Fig. 5 is the front view of airfoil type aerator 2 of the present invention；
Fig. 6 is the side view of airfoil type aerator 2 of the present invention；
Fig. 7 is another three-dimensional structure diagram of airfoil type aerator 2 of the present invention；
Fig. 8 is the third three-dimensional structure diagram of airfoil type aerator 2 of the present invention；
Fig. 9,10,11,12 are four kinds of typical overlooking structure figures of airfoil type aerator 2 of the present invention.
In figure respectively marked as：Flaring gate pier -1, airfoil type aerator -2, Stepped Spillway -3, ogee section -4, stiling basin -5,
Wing section -6, conventional aerator section -7, current -8.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further illustrated.
Embodiment 1：As shown in figs. 1-12, a kind of combined energy dissipater with airfoil type aerator, including flaring gate pier 1, wing
Type aerator 2, Stepped Spillway 3, ogee section 4, stiling basin 5；Wing is set between the flaring gate pier 1 and Stepped Spillway 3
Type aerator 2；The left and right sides of airfoil type aerator 2 is wing section 6, and interlude is conventional aerator section 7, airfoil type aerator
Flaring gate pier 1 is terminated before 2, tail end connects Stepped Spillway 3；Reversed segmental arc 4 under Stepped Spillway 3；Stiling basin 5 is connect under ogee section 4；Let out
Current 8 are from flaring gate pier 1 when big vast, through airfoil type aerator 2, followed by downstream Stepped Spillway 3, ogee section 4, into stiling basin
5, finally flow to downstream.
Further, as shown in Figure 2 and Figure 3, Fig. 2 is airfoil type aerator 2 of the present invention, and Fig. 3 is conventional two-dimensional continuous linear
Type chooses bank, and the airfoil type aerator 2 is to choose that bank front end is symmetrical to prune a part in conventional two-dimentional continuous linear type, is made
Aeration ramp is changed into similar wing build from obtuse angle triangular prism build, 2 front end of airfoil type aerator is thin and tail end is thick, thick middle
And both sides are thin, current by 2 center of airfoil type aerator to choosing in the air, and two survey current are chosen along both wings diffusion.
Further, as shown in Figure 4,5, 6, in the airfoil type aerator 2:L1 is conventional 7 bottom of aerator section
Length, L4 are conventional 7 upper bottom edge length of aerator section, and L2 is the bottom of wing section 6 edge lengths, and L3 is 6 upper surface both sides of wing section
Side（It is horizontal linear in Fig. 4）The length of wing, B go to the bottom hem width for airfoil type aerator 2, and L5 is 6 overall width of wing section, L6
For 2 end thickness of airfoil type aerator, L8 is the difference in height of 6 end height of wing section and conventional 7 end height of aerator section, L9
For 6 upper surface inclined side of wing section（It is parallax in Fig. 4）The length of wing, α be conventional 7 upper surface upper bottom edge of aerator section with
The angle of side（As shown in Figure 4）, angles of the β between 6 upper surface of wing section and horizontal plane（As shown in Figure 5）, γ is conventional mixes
The angle of 7 side of gas bank section and 2 bottom of airfoil type aerator（That is the angle of airfoil type aerator 2, as shown in Figure 6）, δ is wing
6 upper surface two sides wings of section and the angle of 2 bottom of airfoil type aerator（As shown in Figure 6）, wherein α=45o ~ 180o, β=0 ~ 45
O, γ=0 ~ 11.3o, δ=0o ~ 90o.
The high-velocity flow that high water head, large discharge per unit produce, makes flood discharge passage be also easy to produce the destruction of cavitation corrosion cavitation, while at a high speed
The huge energy that current are brought, not only increases the depth and length of stiling basin, increases engineering construction cost.Chinese scholar for this
Flaring gate pier+Stepped Spillway+stiling basin integration efficiency work(is proposed, as shown in Figure 1, being received using flaring gate pier 1 to the transverse direction of incoming
Contracting and longitudinal stretching cause current to be provoked in flaring gate pier exit, form the water wing longitudinally to tower so that current are in atmosphere
Bring large quantity of air into, after falling into stiling basin, water is mutually blended with gas, rotary roll, collision, eliminates a large amount of energy of current, this to disappear
Energy mode combines the airfoil type aerator 2 of the present invention so that aerated cavity area increases, and aeration effect is more abundant, greatly reduces
Negative pressure on chopped-off head step, prevents the cavitation corrosion cavitation of chopped-off head step from destroying, while cavitation corrosion cavitation is not likely to produce on the cascaded surface of downstream
Destroy, since aeration effect is more abundant, improve water body rate of oxygen, improve the existence ring of water quality and downstream aquatic animals and plants
Border；Simultaneously because this chooses bank transverse direction shunting function, reduce longitudinal water flow, alleviate downstream Stepped Spillway and the power that disappears
Pond, energy dissipating burden, increases flood-relief channel entirety energy dissipation rate.
Fig. 4, Fig. 5, Fig. 6, are respectively each dimensional parameters detail drawing of airfoil type aerator 2, wherein Fig. 4 is airfoil type aerator 2
The top view being applied in flood discharge passage, Fig. 5 are 2 front view of airfoil type aerator, and Fig. 6 is 2 side view of airfoil type aerator.
Fig. 2,7,8,9,10,11,12 are several typically airfoil type aerator bank types in patent of the present invention, in wherein Fig. 2
α=90o, β=15o, γ=8o, δ=20o；α=100o in Fig. 7, β=35o, γ=10o, δ=90o；α=110o in Fig. 8, β=10
O, γ=11.3o, δ=22o.
Airfoil type aerator 2 of the present invention is connected to flaring gate pier+Stepped Spillway+stiling basin integration energy dissipater's flaring gate pier and goes out
Mouthful and Stepped Spillway junction, play the role of air mixing corrosion reducing etc., current from flaring gate pier 1 flow out through airfoil type aerator 2 when,
Current are provoked so that aerated cavity is formed between current and Stepped Spillway 3, a large amount of gases are sucked in current by volume, can had
Effect reduces the negative pressure on downstream Stepped Spillway 3, protects Stepped Spillway 3 to be destroyed from cavitation corrosion cavitation, while roll up the big of suction
Gas is measured, oxygen content of water can be increased, the improvement result played to the living environment of water quality and aquatic animals and plants, good
Aeration ramp build, can effectively reduce atomizating phenomenon caused by aerial drainage, avoid the engineering safety of key water control project and downstream bank slope
Threatened be subject to atomization destruction；The flaring gate pier 1 is connected to 3 upstream of Stepped Spillway, and cross-direction shrinkage and longitudinal direction are played to incoming
Diffusion, can provoke current, in atmosphere a large amount of aerations, and increase turbulent fluctuation dissipates, so as to reduce water flow dynamic energy；The rank
Terraced overfall dam 3 is connected to after flaring gate pier, when incoming passes through ladder, vortex clockwise is produced in ladder, not only to miscarrying
Raw stronger shear stress reduces water flow dynamic energy, and vortex can roll up suction large quantity of air, and increase turbulent fluctuation dissipates, and reduces water flowing
Energy；The stiling basin 5, is connected to behind Stepped Spillway 3, cuts down a large amount of water flow dynamic energies, current smooth-going flow direction during flood discharge
Downstream, makes dam site from impacting, protects the safety of dam body and downstream hydraulic structure；The present invention realizes effectively reduction water conservancy project and builds
The destruction of thing cavitation corrosion cavitation is built, increases substantially energy dissipation rate, while great improvement is brought to reservoir area Ecology bad border so that one
This new Energy Dissipation Modes of body energy dissipater, make something perfect even more perfect, and this is simple in structure, convenient and practical easy to construct.
The embodiment of the present invention is explained in detail above in association with attached drawing, but the present invention is not limited to above-mentioned
Embodiment, within the knowledge of a person skilled in the art, can also be before present inventive concept not be departed from
Put that various changes can be made.
Claims (3)
- A kind of 1. combined energy dissipater with airfoil type aerator, it is characterised in that：Including flaring gate pier（1）, airfoil type aerator （2）, Stepped Spillway（3）, ogee section（4）, stiling basin（5）；The flaring gate pier（1）With Stepped Spillway（3）Between set Airfoil type aerator（2）；Airfoil type aerator（2）The left and right sides be wing section（6）, interlude is conventional aerator section（7）, Airfoil type aerator（2）Preceding termination flaring gate pier（1）, tail end connect Stepped Spillway（3）；Stepped Spillway（3）Under reversed segmental arc （4）；Ogee section（4）Under connect stiling basin（5）；Current during flood discharge（8）From flaring gate pier（1）, through airfoil type aerator（2）, flow successively Through downstream Stepped Spillway（3）, ogee section（4）, into stiling basin（5）, finally flow to downstream.
- A kind of 2. combined energy dissipater with airfoil type aerator according to claim 1, it is characterised in that：The wing Type aerator（2）It is to choose that bank front end is symmetrical to prune a part in conventional two-dimentional continuous linear type so that aeration ramp is by three Corner post build is changed into similar wing build, airfoil type aerator（2）Front end is thin and tail end is thick, thick middle and both sides are thin, by machine Aerofoil profile aerator（2）The current at center to choosing in the air, and two survey current are chosen along both wings diffusion.
- A kind of 3. combined energy dissipater with airfoil type aerator according to claim 2, it is characterised in that:The machine Aerofoil profile aerator（2）In:L1 is conventional aerator section（7）Bottom edge lengths, L4 are conventional aerator section（7）Upper bottom edge length, L2 is wing section（6）Bottom edge lengths, L3 is wing section（6）The length of upper surface two sides wing, B are airfoil type aerator （2）Bottom hem width, L5 is wing section（6）Overall width, L6 are airfoil type aerator（2）End thickness, L8 are wing section（6）End End height and conventional aerator section（7）The difference in height of end height, L9 are wing section（6）The length of upper surface inclined side wing, α For conventional aerator section（7）Upper surface upper bottom edge and the angle of side, β are wing section（6）Angle between upper surface and horizontal plane, γ is conventional aerator section（7）Side and airfoil type aerator（2）The angle of bottom, δ are wing section（6）Upper surface two sides machine The wing and airfoil type aerator（2）The angle of bottom, wherein α=45o ~ 180o, β=0 ~ 45o, γ=0 ~ 11.3o, δ=0o ~ 90o.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710881933.XA CN107905185A (en) | 2017-09-26 | 2017-09-26 | A kind of combined energy dissipater with airfoil type aerator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710881933.XA CN107905185A (en) | 2017-09-26 | 2017-09-26 | A kind of combined energy dissipater with airfoil type aerator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2915940Y (en) * | 2006-06-12 | 2007-06-27 | 河海大学 | Curved aerated chute |
| WO2011123870A1 (en) * | 2010-03-30 | 2011-10-06 | Peter Phillip Jordaan | Breakwater structure |
| CN102619200A (en) * | 2012-04-13 | 2012-08-01 | 中国水利水电科学研究院 | Energy dissipation method of sidewall aeration steps and outlet submerged flip bucket of inclined shaft type flood discharge tunnel |
-
2017
- 2017-09-26 CN CN201710881933.XA patent/CN107905185A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2915940Y (en) * | 2006-06-12 | 2007-06-27 | 河海大学 | Curved aerated chute |
| WO2011123870A1 (en) * | 2010-03-30 | 2011-10-06 | Peter Phillip Jordaan | Breakwater structure |
| CN102619200A (en) * | 2012-04-13 | 2012-08-01 | 中国水利水电科学研究院 | Energy dissipation method of sidewall aeration steps and outlet submerged flip bucket of inclined shaft type flood discharge tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 张靓等: "前置掺气坎角度对溢流坝阶梯面消能特性的影响", 《水利水运工程学报》 * |
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