CN207300538U - Open channel turbulence inhibitor - Google Patents
Open channel turbulence inhibitor Download PDFInfo
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- CN207300538U CN207300538U CN201721343271.2U CN201721343271U CN207300538U CN 207300538 U CN207300538 U CN 207300538U CN 201721343271 U CN201721343271 U CN 201721343271U CN 207300538 U CN207300538 U CN 207300538U
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- control panel
- open channel
- inlet end
- water inlet
- water outlet
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Abstract
A kind of open channel turbulence inhibitor, control panel, water inlet end and water outlet, pass through control panel, water inlet end and water outlet make upland water produce field of turbulent flow by coarse or curved surface irregular footpath flow section, by the current flowed through effect layer is produced on control panel border, a strong field of turbulent flow is produced along the current of open channel and along journey turbulence intensity continuous decrement, form flow characteristics, current streamline is made by water inlet end and water outlet and turbulence control plate is appropriate is connected, the current of wall turbulent flow close to control panel produce different surfaces feature constraint control current, reach the detection control to wall turbulent flow.The utility model overcomes the problem of data resolution that former open channel flume experiment instrument gathers is low, error is big original, the characteristics of having simple in structure, the turbulence intensity of enhancing wall turbulent flow, improve the reliability and accuracy that experimental data gathers.
Description
Technical field
The utility model belongs to hydrodynamics wall turbulence control technical field, is related to a kind of open channel turbulence inhibitor.
Background technology
Turbulent motion is widely present in the open-channel flow of nature, understands the hydraulic characteristic(s) of wall turbulent motion for engineering
Practical problem is of great practical significance, such as:The diffusion of the rule, Mixing Coefficient in Rectangular Channels of sediment movement, open channel containing plant
Hydrodynamic characterisitic etc..Wall turbulent flow is traditionally studied mainly for reaching the control effect to wall turbulent flow, to reduce wall surface resistance
For the purpose of, apply flowing control to swiftly passing object to effectively reduce wall surface resistance, increase the propulsive efficiency of aircraft
And stability.Wall turbulence control has passive control and active control two ways, mainly there is grooved surface method, perforate method, cross rib
Bar method, functional material drag reduction method, suction method, big turbo-charger set device method etc..
1. grooved surface method, the minute groove of certain condition is met by being opened up in wall along in flow direction, can weaken and press down
Flow field generation processed flows to vortex structure, and to achieve the purpose that to reduce resistance, but shortcoming is that groove is easily blocked up by impurity such as greasy dirt, dust
Fill in and fail, it is necessary to often clean.
2. perforate method, by setting appropriate diamond-mesh round pool point lattice structure in wall, this structure can form one
Can kind special fluidised form, be the main reason for it obtains drag reduction, but reach in atmosphere and significantly drag reduction identical in water,
Need further to be studied.
3. transverse ribs method, will be perpendicular to the small size rib of flow direction, distance is fixed on tablet in certain intervals
On, caused by analysis show that wall turbulent skin friction drag reduction is due to the change of average velocity distributions, but in practical application
In also have some limitations.
4. suction method, drag principle mainly by the spray high-velocity fluid into wall boundary layer and siphons away low velocity fluid, this
Sample can reduce the pressure drag in smoothness, suppress the separation of turbulent boundary layer, improve the stability in flow field boundary layer, and energy
Enough reach the effect of drop resistance.
5. big turbo-charger set device method, opening up to lamellar horizontal setting to go out in upstream near wall（Less than the thickness in boundary layer）,
The large vortex stucture in flow field can be effectively smashed, is that Turbulence-bursting weakens, the effect of obvious drop resistance can be obtained.
This 5 kinds of methods are the methods of current wall turbulence control comparative maturity, respectively there is advantage and disadvantage, and technology, which implements, all to be compared
It is complicated and difficult, and their major function be reduce wall surface resistance.Therefore, the utility model proposes a kind of turbulent flow control
The function of making sheet, overcomes that the mean flow rate of common laboratory open channel sink generation is relatively low, and average Reynolds numbdr is smaller, average turbulent flow
Intensity is weaker so that the data resolution of laboratory apparatus collection is low, the problem of error is big, and the turbulent fluctuation for enhancing wall turbulent flow is strong
Degree, the limitation of resistance can only be dropped by being different from traditional wall turbulence control, be carried for low reynolds number open channel turbulent flow experimental study wall turbulent flow
For feasible research device.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of open channel turbulence inhibitor, simple in structure, sets
The bottom in open channel, for solving the problems, such as that the wall turbulent flow that common laboratory open channel produces is weaker, the turbulent fluctuation of enhancing wall turbulent flow is strong
Degree, improves the reliability and accuracy of experimental data collection.
In order to solve the above technical problems, technical solution is used by the utility model：A kind of open channel turbulence inhibitor,
The device is blocks, it includes control panel, water inlet end and water outlet；The control panel is horizontal plate, and bottom is smooth flat
It is whole；The arcuate structure body that the water inlet end is made of multistage semi arch；The knot that the water outlet is made of oval cambered surface
Structure body；Water inlet end and water outlet are connected with control panel two ends respectively, and bottom is on the same face positioned at bright with control panel bottom
Contacted in the middle part of canal with canal bottom, water inlet end is located at inflow direction.
The water inlet end is by the first a quarter cylinder and the second a quarter cylinder is tangent is composed, and first
The half of the radius of a quarter cylinder and the second a quarter cylinder plate thickness in order to control.
The water outlet is made of a quarter Elliptic Cylinder, and elliptical semi-minor axis is identical with the height of control panel, long
Semiaxis is one times of semi-minor axis.
The control panel is solid plate.
Control panel, water inlet end or the water outlet is loose structure.
The upper surface that the control panel is contacted with current is coarse flat surface, smooth curved surface or coarse song
Face, curved surface are circular arc camber, oval arc surface, SIN function curved surface or imitative river topography curved surface etc..
Control panel, water inlet end or the material of water outlet is mixed mud, glass material, metal material or plastics material
Material.
A kind of open channel turbulence inhibitor, the device are blocks, it includes control panel, water inlet end and water outlet；Control
Plate is horizontal plate, and bottom is smooth；The arcuate structure body that water inlet end is made of multistage semi arch；Water outlet is by oval arc
The structure of face composition；Water inlet end and water outlet are connected with control panel two ends respectively, and bottom is in same with control panel bottom
Contacted on face in the middle part of open channel with canal bottom, water inlet end is located at inflow direction.It is simple in structure, by control panel, water inlet end and go out
Water end (W.E.) makes upland water produce field of turbulent flow by coarse or curved surface irregular footpath flow section, is being controlled by the current flowed through
Making sheet border produces effect layer, and a strong field of turbulent flow is produced and along journey turbulence intensity continuous decrement, shape along the current of open channel
Into flow characteristics, current streamline is made by water inlet end and water outlet and turbulence control plate is appropriate is connected, wall turbulent flow is close to control
The current of plate produce different surfaces feature constraint control current, reach the detection control to wall turbulent flow, which is arranged at open channel
Middle bottom, solves the problems, such as that the wall turbulent flow that open channel produces is weaker, the turbulence intensity of enhancing wall turbulent flow, improves experimental data collection
Reliability and accuracy.
In preferable scheme, water inlet end is by the first a quarter cylinder and the second tangent combination of a quarter cylinder
Form, the half of the radius of the first a quarter cylinder and the second a quarter cylinder plate thickness in order to control.Pass through experiment
Data water inlet end using semi arch and arc radius in order to control the half of plate thickness when, resistance to water-flow is minimum, and the water flowed through most holds
Vortex is also easy to produce, improves turbulence intensity.
In preferable scheme, water outlet is made of a quarter Elliptic Cylinder, the height of elliptical semi-minor axis and control panel
Spend identical, major semiaxis is one times of semi-minor axis.Oval structure, and elliptical semi-minor axis and control are used by experimental data water outlet
The height of making sheet is identical, and when major semiaxis is one times of semi-minor axis, water flow stationary, the current flowed through are not likely to produce larger vortex,
Turbulence intensity can progressively be weakened, avoid strong turbulence from washing away open channel.
In preferable scheme, control panel is solid plate.The vortex that current are produced by solid plate is steady, balanced,
Stable wall turbulent flow is controlled easy to relevant device detection.
In preferable scheme, control panel, water inlet end or water outlet are loose structure.Current pass through the plate of loose structure
The vortex turbulence intensity of generation is different with frequency, and the wall turbulent flow of control different conditions is detected easy to relevant device.
In preferable scheme, upper surface that control panel is contacted with current is coarse flat surface, smooth curved surface or
Coarse curved surface, curved surface are circular arc camber, oval arc surface, SIN function curved surface or imitative river topography curved surface etc..According to difference
Current diametric plane or the footpath flow section detection that be combined with each other control wall turbulent flow under different operating modes.
In preferable scheme, control panel, water inlet end or the material of water outlet are mixed mud, glass material, metal material
Or plastic material.Different materials are selected relevant to use the longevity to improve according to the density of current, the acid-base value of water quality and sand content
Life and detection control accuracy.
A kind of open channel turbulence inhibitor provided by the utility model, control panel, water inlet end and water outlet, pass through control
Plate, water inlet end and water outlet make upland water produce field of turbulent flow by coarse or curved surface irregular footpath flow section, pass through
The current flowed through produce effect layer on control panel border, and a strong field of turbulent flow and strong along journey turbulent fluctuation is produced along the current of open channel
Continuous decrement is spent, forms flow characteristics, current streamline is made by water inlet end and water outlet and turbulence control plate is appropriate is connected, wall
The current of turbulent flow close to control panel produce different surfaces feature constraint control current, reach the detection control to wall turbulent flow.Overcome
The problem of data resolution of former open channel flume experiment instrument collection is low, error is big.The utility model has simple in structure, increasing
The characteristics of turbulence intensity of strong wall turbulent flow, the reliability and accuracy of raising experimental data collection.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is the usage state diagram of the utility model.
Fig. 2 is the schematic side view of Fig. 1.
Fig. 3 is schematic cross-sectional view at the A-A of Fig. 2.
Fig. 4 is the structure diagram of the utility model.
Fig. 5 is another structure diagram of the utility model.
Fig. 6 is another structure diagram of the utility model.
Fig. 7 is another structure diagram of the utility model.
Fig. 8 is another structure diagram of the utility model.
In figure：Control panel 1, water inlet end 2, the first a quarter cylinder 21, the second a quarter cylinder 22, water outlet
3, a quarter Elliptic Cylinder 31, open channel 4.
Embodiment
In Fig. 1 ~ Fig. 8, a kind of open channel turbulence inhibitor, the device is blocks, it includes control panel 1, water inlet end 2
With water outlet 3；The control panel 1 is horizontal plate, and bottom is smooth；The water inlet end 2 is made of multistage semi arch
Arcuate structure body；The structure that the water outlet 3 is made of oval cambered surface；Water inlet end 2 and water outlet 3 respectively with control
1 two ends of plate connect, and bottom is on the same face with 1 bottom of control panel and is contacted positioned at the middle part of open channel 4 with canal bottom, water inlet end 2
In inflow direction.It is simple in structure, upland water is made by coarse or curved surface by control panel 1, water inlet end 2 and water outlet 3
Irregular footpath flow section produces field of turbulent flow, effect layer is produced on 1 border of control panel by the current flowed through, along the current of open channel
Produce a strong field of turbulent flow and along journey turbulence intensity continuous decrement, form flow characteristics, pass through water inlet end 2 and water outlet 3
Make current streamline and turbulence control plate is appropriate is connected, the current of wall turbulent flow close to control panel 1 produce different surfaces feature constraint
Control current, reach the detection control to wall turbulent flow, which is arranged at bottom in open channel, solve wall turbulent flow that open channel produces compared with
The problem of weak, the turbulence intensity of enhancing wall turbulent flow, improves reliability and accuracy that experimental data gathers.
In preferable scheme, the water inlet end 2 is by the first a quarter cylinder 21 and the second a quarter cylinder
22 it is tangent be composed, the radius of the first a quarter cylinder 21 and the second a quarter cylinder 22 1 thickness of plate in order to control
Half.By experimental data water inlet end 2 using semi arch and arc radius in order to control the half of 1 thickness of plate when, resistance to water-flow
Minimum, the water flowed through are easiest to produce vortex, improve turbulence intensity.
In preferable scheme, the water outlet 3 is made of a quarter Elliptic Cylinder 31, elliptical semi-minor axis and control
The height of plate 1 is identical, and major semiaxis is one times of semi-minor axis.Oval structure is used by experimental data water outlet 3, and it is elliptical short
Semiaxis is identical with the height of control panel 1, when major semiaxis is one times of semi-minor axis, water flow stationary, the current flowed through be not likely to produce compared with
Big vortex, can progressively weaken turbulence intensity, avoid strong turbulence from washing away open channel.
In preferable scheme, the control panel 1 is solid plate.Current by vortex that solid plate produces it is steady,
Equilibrium, stable wall turbulent flow is controlled easy to relevant device detection.
In preferable scheme, the control panel 1, water inlet end 2 or water outlet 3 are loose structure.Current pass through porous knot
The vortex turbulence intensity that the plate of structure produces is different with frequency, and the wall turbulent flow of control different conditions is detected easy to relevant device.
In preferable scheme, the upper surface that the control panel 1 is contacted with current is coarse flat surface, smooth song
Face or coarse curved surface, curved surface are circular arc camber, oval arc surface or SIN function curved surface.According to different current diametric planes or phase
The footpath flow section detection mutually combined controls the wall turbulent flow under different operating modes.
In preferable scheme, the control panel 1, water inlet end 2 or the material of water outlet 3 are mixed mud, glass material, gold
Belong to material or plastic material.Select different materials relevant to improve according to the density of current, the acid-base value of water quality and sand content
Service life and detection control accuracy.
Claims (7)
1. a kind of open channel turbulence inhibitor, it is characterized in that：The device is blocks, it includes control panel（1）, water inlet end（2）
And water outlet（3）；The control panel（1）It is smooth for horizontal plate, bottom；The water inlet end（2）By multistage semicircle
The arcuate structure body of arc composition；The water outlet（3）The structure being made of oval cambered surface；Water inlet end（2）And water outlet
（3）Respectively with control panel（1）Two ends connect, bottom and control panel（1）Bottom, which is on the same face, is located at open channel（4）Middle part with
Canal bottom contacts, water inlet end（2）Positioned at inflow direction.
2. open channel turbulence inhibitor according to claim 1, it is characterized in that：The water inlet end（2）By the one or four point
One of cylinder（21）With the second a quarter cylinder（22）It is tangent to be composed, the first a quarter cylinder（21）With
Two a quarter cylinders（22）Radius plate in order to control（1）The half of thickness.
3. open channel turbulence inhibitor according to claim 1, it is characterized in that：The water outlet（3）By a quarter
Elliptic Cylinder（31）Form, elliptical semi-minor axis and control panel（1）Height it is identical, major semiaxis is one times of semi-minor axis.
4. open channel turbulence inhibitor according to claim 1, it is characterized in that：The control panel（1）For solid plate.
5. open channel turbulence inhibitor according to claim 1, it is characterized in that：The control panel（1）, water inlet end（2）
Or water outlet（3）For loose structure.
6. open channel turbulence inhibitor according to claim 1, it is characterized in that：The control panel（1）Contacted with current
Upper surface be coarse flat surface, smooth curved surface or coarse curved surface, curved surface is circular arc camber, oval arc surface, just
String function surface or imitative river topography curved surface.
7. according to any open channel turbulence inhibitor of claim 1 ~ 6, it is characterized in that：The control panel（1）, water inlet
End（2）Or water outlet（3）Material be mixed mud, glass material, metal material or plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343271.2U CN207300538U (en) | 2017-10-18 | 2017-10-18 | Open channel turbulence inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343271.2U CN207300538U (en) | 2017-10-18 | 2017-10-18 | Open channel turbulence inhibitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207300538U true CN207300538U (en) | 2018-05-01 |
Family
ID=62272754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721343271.2U Expired - Fee Related CN207300538U (en) | 2017-10-18 | 2017-10-18 | Open channel turbulence inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207300538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051179A (en) * | 2017-10-18 | 2018-05-18 | 三峡大学 | Open channel turbulence inhibitor |
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2017
- 2017-10-18 CN CN201721343271.2U patent/CN207300538U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051179A (en) * | 2017-10-18 | 2018-05-18 | 三峡大学 | Open channel turbulence inhibitor |
| CN108051179B (en) * | 2017-10-18 | 2024-04-19 | 三峡大学 | Open channel turbulence control device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| 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: 20180501 Termination date: 20191018 |