CN108867574B - Calibration model sluice for numerical simulation and generalization method thereof - Google Patents
Calibration model sluice for numerical simulation and generalization method thereof Download PDFInfo
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- CN108867574B CN108867574B CN201810543500.8A CN201810543500A CN108867574B CN 108867574 B CN108867574 B CN 108867574B CN 201810543500 A CN201810543500 A CN 201810543500A CN 108867574 B CN108867574 B CN 108867574B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
- E02B7/36—Elevating mechanisms for vertical-lift gates
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The invention discloses a calibration model sluice gate used in numerical simulation, which comprises a water tank and at least one gate device arranged in the water tank, wherein the water tank comprises a tank bottom and side walls arranged at two sides of the tank bottom, the gate device comprises a door plate capable of moving up and down, and the door plate spans the two side walls. The invention also discloses a method for generalizing the calibration model sluice in numerical simulation. Has the advantages that: the method can simplify the grid of the calibration model, improve the calculation precision, reduce the calculation amount and shorten the calculation time, the water gate parameters can be flexibly adjusted, and the rapid simulation and the replay of the water flow state under the states of full opening, partial opening and closing of the water gate can be realized. The invention relates to the field of fluid dynamics numerical simulation calculation.
Description
Technical Field
The invention relates to the field of fluid dynamics numerical simulation calculation, in particular to a calibration model sluice used in numerical simulation and a generalization method thereof.
Background
In recent years, with the rapid development of Computational Fluid Dynamics (CFD) and the change of computer technology, the numerical simulation of fluid becomes an important technical means and method for researching complex hydraulics problems, and by establishing a continuous equation, a momentum equation and an energy equation, adopting a certain numerical calculation method, and with the help of the powerful calculation capability and the programmed calculation process of a computer, the process on line of the complex hydraulics problems can be realized, and the real-time process simulation calculation of important parameters including flow rate, pressure, water level and the like can be realized. In recent years, with the massive construction of hydraulic engineering, including bridges, wharfs, water gates and the like, the influence on the water potential, water level, flow velocity and flux of large rivers is caused, so that the influence on river channel flood control, embankment safety, water environment quality and the like is caused. Therefore, the development of numerical simulation research can provide a basis for the decision of the construction of hydraulic engineering, and is an important research means and method at present.
In the prior art, a general method of a conventional sluice is as follows: change river course topography state, carry out the net arrangement of encryption at the sluice to simulate out the sluice on the physique, including gate and gate pier etc. its technical defect lies in: the method requires the establishment of a complex coordinate system, and under the condition that the sluice is smaller relative to the water area, the number of required grids is large, and the calculation time is long.
In the prior art, another conventional sluice generalization method is: the method of adopting static roughness, through the net roughness of adjusting sluice department, come the influence of simulation sluice to rivers, its technical defect lies in: the water flow itself also has some effect on this virtual roughness, resulting in a reduction in the accuracy of the static roughness.
Disclosure of Invention
The invention aims to solve the technical problem of providing a calibration model sluice used in numerical simulation and a generalization method thereof, which can realize the rapid simulation and the rehearsal of the water flow state under the states of full opening, partial opening and closing of the sluice.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a rate model sluice for among numerical simulation, includes the basin and establishes at least one gate device in the basin, and the basin includes the tank bottom and establishes the lateral wall in the tank bottom both sides, and gate device is including the door plant that can reciprocate, and the door plant spanes two lateral walls.
As the improvement, the gate device also comprises a support, the support comprises a first upright post and a second upright post, and guide structures are respectively arranged between the two sides of the door plate and the first upright post and between the two sides of the door plate and the second upright post.
As an improvement, the guide structure comprises guide grooves respectively arranged on two sides of the door panel and guide rails respectively arranged on the first upright post and the second upright post, and the guide grooves are in sliding fit with the guide rails.
As the improvement, the top of the support is provided with a lifting device, a chain is arranged between the lifting device and the door panel, a chain wheel matched with the chain is arranged in the lifting device, the chain wheel is driven by a servo motor, and the servo motor is connected with an external computer.
As the improvement, the support also comprises a third upright post and a fourth upright post, wherein the first upright post, the second upright post, the third upright post and the fourth upright post are distributed in a rectangular mode.
As the improvement, be equipped with the mounting groove of indent on two lateral walls respectively, first stand, second stand, third stand and fourth stand imbed the mounting groove respectively in.
A generalization method of a calibration model sluice used in numerical simulation uses the calibration model sluice to perform numerical simulation calculation.
As an improvement, the distance between the lower edge of the door plate and the bottom of the water tank is set as a water gate opening e, the flow rate of the water body in the water tank is set as v, the height of the water level in the water tank is set as h, and the roughness n is set as A1 × e + A2 × v + A3 × h, wherein 0.01 ≦ A1 ≦ 0.015, wherein 0.015 ≦ A2 ≦ 0.018, and wherein 0.026 ≦ A3 ≦ 0.038.
As an improvement, a plurality of tests are carried out, and different opening degrees e of the water gate, the flow velocity v of the water body in the water tank or the height h of the water level in the water tank are set in each test.
Has the advantages that: the method can simplify the grid of the calibration model, improve the calculation precision, reduce the calculation amount and shorten the calculation time, the water gate parameters can be flexibly adjusted, and the rapid simulation and the replay of the water flow state under the states of full opening, partial opening and closing of the water gate can be realized.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a sink according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a lock gate device according to an embodiment of the present invention;
FIG. 3 is a left side view of FIG. 2 of an embodiment of the present invention;
the embodiment and the drawings in the specification relate to the terms and numbers including: the water tank comprises a water tank 1, a tank bottom 2, a side wall 3, a door panel 4, a first upright post 5, a second upright post 6, a lifting device 7, a chain 8, a third upright post 9 and a mounting groove 10.
Detailed Description
Referring to fig. 1 to 3, a calibration model sluice for use in numerical simulation includes a water tank 1 and a gate device provided in the water tank 1, the water tank 1 including a tank bottom 2 and side walls 3 provided at both sides of the tank bottom 2, the gate device including a gate plate 4 movable up and down, the gate plate 4 spanning the two side walls 3. The shape of the door panel 4 is rectangular, the distance between the lower edge of the door panel 4 and the bottom 2 of the water tank is set to be the opening e of the water gate, the door panel 4 can move up and down in the water tank 1, the opening e of the water gate can be flexibly changed, and the rapid simulation and the replay of the flowing state of water flowing in the states of full opening, partial opening and closing of the water gate can be realized.
In order to improve the stability of the door panel 4 in water flow, the gate device further comprises a support, the support comprises a first upright post 5 and a second upright post 6, and guide structures are respectively arranged between two sides of the door panel 4 and the first upright post 5 and the second upright post 6. The guide structure can improve the accuracy that door plant 4 reciprocated and improve the stability of door plant 4 in rivers, makes the reciprocating of door plant 4 operate more easily, is favorable to improving numerical simulation calculation's accuracy.
In order to make the door panel 4 move up and down smoothly, the guide structure comprises guide grooves respectively arranged at two sides of the door panel 4 and guide rails respectively arranged on the first upright post 5 and the second upright post 6, and the guide grooves are in sliding fit with the guide rails. The sliding fit guide structure has small movement clearance, can reduce the influence of the movement clearance on the water flow overflowing state, and is favorable for improving the accuracy of numerical simulation calculation.
In order to realize the automation that door plant 4 reciprocated and improve its adjustment accuracy, the top of support is equipped with hoisting device 7, is equipped with chain 8 between hoisting device 7 and the door plant 4, is equipped with in hoisting device 7 with 8 complex sprockets of chain, the sprocket is driven by servo motor, servo motor and outside computer connection. The servo motor drives the door plate 4 to move up and down, the opening e of the gate can be automatically converted, manual measurement is not needed, and human errors in multiple tests can be eliminated. The automatic operation can be carried out in the rapid simulation and replay process of changing the opening e of the gate for many times, and the improvement of the test efficiency is facilitated. In this embodiment, the chain 8 is selected to drive the door panel 4 to move up and down, and the replacement includes, but is not limited to, using ropes, racks, worm gears and other existing technologies.
In order to improve the stability of the support, the support further comprises a third upright post 9 and a fourth upright post, and the first upright post 5, the second upright post 6, the third upright post 9 and the fourth upright post are distributed in a rectangular mode.
In order to reduce the influence of the bracket on the water flow state, the two side walls 3 are respectively provided with an inwards concave mounting groove 10, and the first upright post 5, the second upright post 6, the third upright post 9 and the fourth upright post are respectively embedded into the mounting grooves 10. The concave depth of the mounting groove 10 is not less than the sectional dimension of the first upright post 5, the second upright post 6, the third upright post 9 or the fourth upright post, so that the support can be prevented from protruding from the side wall 3, the influence of the support on the water flow-through state can be reduced, and the accuracy of numerical simulation calculation can be improved.
An embodiment of a generalized method for rating model floodgates in numerical simulations:
(1) the model sluice in this embodiment adopts open type haplopore floodgate, can move the sluice up and down in order to adapt to the requirement of different experimental groups, can also set up multiunit mounting groove in the length direction of basin to different positions in the rivers direction set up the gate device, in order to adapt to the requirement of different experimental groups. The basin in this embodiment adopts variable water depth design, the rivers degree of depth in the steerable basin.
(2) The structural size of the steel sluice for the model needs to meet certain requirements, the model scale of the original sluice size and the model sluice size is set to be R, wherein R is more than or equal to 5 and less than or equal to 10, the water depth of the original sluice is set to be H, the river width of the original sluice is set to be B, the length of the water tank is set to be LModel (model)＝LProtomer/R+fL(H, B) setting the width of the door panel to WModel (model)＝WProtomer/R+fW(H, B), wherein 0.001 is less than or equal to α is less than or equal to 0.016.
(3) Carrying out physical model test research on the sluice to determine the water flow overflowing characteristic of the sluice, and acquiring data of the gate opening e, the water flow velocity v and the water level h under the multi-group test working condition;
(4) establishing a river and sluice numerical model, wherein the sluice is covered by an orthogonal grid, so that the difference between the sluice scale and the grid scale is not large;
(5) establishing a relational expression of the roughness n, the opening e of a gate, the flow velocity v of the water body and the water level h, wherein the roughness n is f (e, v and h); for a conventional sluice, a physical model test with a small scale is firstly carried out, v, e and h values of different groups are tested through different groups of test studies, and a roughness value, namely n ═ R, is determined through a Manning formula and a thanksack formula2/3J1/2Finally, through the ternary linear regression analysis of n and v, e and h, the relation of n ═ f (e, v and h) is finally determined as n ═ A1 × e + A2 × v + A3 × h, wherein A1, A2 and A3 are correlation coefficients, the coefficient values are different for different gates and water flow conditions, according to the experience, the value of A1 is not less than 0.015, the value of A2 is not less than 0.018, and the value of A3 is not less than 0.026 is not less than 0.038.
(6) In the process of carrying out numerical simulation, firstly, parameter values A1, A2 and A3 are given according to the structure type of a sluice, particularly, at a sluice grid, the influence of the sluice on water flow is simulated by adjusting the roughness, and the physical boundary of the sluice is simulated without changing the land area and the water area boundary of the gridi、vi、hiFor step i +1 roughness of grid point of water gate, ni+1＝A1×eiAnd calculating + A2 × v + A3 × h, and adjusting the roughness in real time until the calculation is stable.
(7) In specific operation, through multiple test studies of physical model tests, the correlation between the coefficients a1, a2, A3 and n can be established by a large amount of data, so that the implicit expression of n ═ f (e, v, h) can be determined, and the accuracy and stability of calculation can be further improved.
An embodiment of a generalized method for rating model floodgates in numerical simulations:
(1) the model sluice in this embodiment adopts open type haplopore floodgate, can move the sluice up and down in order to adapt to the requirement of different experimental groups, can also set up multiunit mounting groove in the length direction of basin to different positions in the rivers direction set up the gate device, in order to adapt to the requirement of different experimental groups. The basin in this embodiment adopts variable water depth design, the rivers degree of depth in the steerable basin.
(2) The structural size of the steel sluice for the model needs to meet certain requirements, the model scale of the original sluice size and the model sluice size is set to be R, wherein R is more than or equal to 5 and less than or equal to 10, the water depth of the original sluice is set to be H, the river width of the original sluice is set to be B, the length of the water tank is set to be LModel (model)＝LProtomer/R+fL(H, B) setting the width of the door panel to WModel (model)＝WProtomer/R+fW(H, B), wherein 0.001 is less than or equal to α is less than or equal to 0.016.
(3) Carrying out physical model test research on the sluice to determine the water flow overflowing characteristic of the sluice, and acquiring data of the gate opening e, the water flow velocity v and the water level h under the multi-group test working condition;
(4) establishing a river and sluice numerical model, wherein the sluice is covered by an orthogonal grid, so that the difference between the sluice scale and the grid scale is not large;
(5) establishing a relational expression of the roughness n, the opening e of a gate, the flow velocity v of the water body and the water level h, wherein the roughness n is f (e, v and h); for a conventional sluice, a physical model test with a small scale is firstly carried out, v, e and h values of different groups are tested through different groups of test studies, and a roughness value, namely n ═ R, is determined through a Manning formula and a thanksack formula2/3J1/2Finally, through the ternary linear regression analysis of n and v, e and h, the relation of n ═ f (e, v and h) is finally determined as n ═ A1 × e + A2 × v + A3 × h, wherein A1, A2 and A3 are correlation coefficients, the coefficient values are different for different gates and water flow conditions, according to the experience, the value of A1 is not less than 0.015, the value of A2 is not less than 0.018, and the value of A3 is not less than 0.026 is not less than 0.038.
(6) In the process of carrying out numerical simulation, firstly, parameter values A1, A2 and A3 are given according to the structure type of a sluice, particularly, at a sluice grid, the influence of the sluice on water flow is simulated by adjusting the roughness, and the physical boundary of the sluice is simulated without changing the land area and the water area boundary of the gridi、vi、hiFor step i +1 roughness of grid point of water gate, ni+1＝A1×eiAnd calculating + A2 × v + A3 × h, and adjusting the roughness in real time until the calculation is stable.
(7) In specific operation, through multiple test studies of physical model tests, the correlation between the coefficients a1, a2, A3 and n can be established by a large amount of data, so that the implicit expression of n ═ f (e, v, h) can be determined, and the accuracy and stability of calculation can be further improved.
The embodiment provides a generalization method of a dynamic roughness sluice, and meanwhile, in order to determine the relationship between the virtual roughness and the water flow characteristic parameters, a movable model sluice device is established, the scale range and the structural design rule of the sluice are determined, and the rapid calibration of the relationship between the virtual roughness and the water flow characteristic parameters can be realized.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (8)
1. A rate model sluice for among numerical simulation, its characterized in that: the water tank comprises a tank bottom and side walls arranged on two sides of the tank bottom, and the gate device comprises a door plate capable of moving up and down and spans the two side walls;
setting the distance between the lower edge of the door plate and the bottom of the water gate as water gate opening e, setting the flow rate of water in the water tank as v, setting the height of water level in the water tank as h, setting the roughness n as A1 × e + A2 × v + A3 × h, wherein the A1 is more than or equal to 0.01 and less than or equal to 0.015, wherein the A2 is more than or equal to 0.015 and less than or equal to 0.018, and wherein the A3 is more than or equal to 0.026 and less than or equal to 0.038.
2. A rate-determined model floodgate for use in numerical simulations, according to claim 1, wherein: the gate device further comprises a support, the support comprises a first stand column and a second stand column, and guide structures are arranged between the two sides of the door plate and the first stand column and between the two sides of the door plate and the second stand column respectively.
3. A rate-determined model floodgate for use in numerical simulations, according to claim 2, wherein: the guide structure comprises guide grooves respectively arranged on two sides of the door panel and guide rails respectively arranged on the first stand column and the second stand column, and the guide grooves are in sliding fit with the guide rails.
4. A rate-determined model floodgate for use in numerical simulations, according to claim 2, wherein: the lifting device is arranged at the top of the support, a chain is arranged between the lifting device and the door plate, a chain wheel matched with the chain is arranged in the lifting device, the chain wheel is driven by a servo motor, and the servo motor is connected with an external computer.
5. A calibration model sluice for use in numerical simulations according to claim 3, characterized in that: the support also comprises a third upright post and a fourth upright post, wherein the first upright post, the second upright post, the third upright post and the fourth upright post are distributed in a rectangular mode.
6. A rate-determined model floodgate for use in numerical simulations, according to claim 5, wherein: the two side walls are respectively provided with an inwards concave mounting groove, and the first stand column, the second stand column, the third stand column and the fourth stand column are respectively embedded into the mounting grooves.
7. A generalization method of a calibration model sluice used in numerical simulation is characterized in that: numerical simulation calculations were performed using the calibration model sluice of any one of claims 1 to 6.
8. The method of claim 7, wherein the method comprises the steps of: and carrying out a plurality of tests, and setting different opening degrees e of the sluice, the flow velocity v of the water body in the water tank or the height h of the water level in the water tank in each test.
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| CN110197030B (en) * | 2019-05-29 | 2020-08-21 | 中国水利水电科学研究院 | Regulating and controlling method for controlling brake flooding outflow |
| CN110597306B (en) * | 2019-10-14 | 2022-10-25 | 中国电建集团中南勘测设计研究院有限公司 | Flow control device |
| CN115795856B (en) * | 2022-11-28 | 2023-10-20 | 广东省水利水电科学研究院 | Monitoring method for downstream flow of sluice |
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| CN107724344A (en) * | 2017-10-19 | 2018-02-23 | 西南交通大学 | A kind of automatically controlled gate for wide tank moment dam break experiment |
| CN208384570U (en) * | 2018-05-29 | 2019-01-15 | 广东省水利水电科学研究院 | For the calibration model sluice in numerical simulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107724344A (en) * | 2017-10-19 | 2018-02-23 | 西南交通大学 | A kind of automatically controlled gate for wide tank moment dam break experiment |
| CN208384570U (en) * | 2018-05-29 | 2019-01-15 | 广东省水利水电科学研究院 | For the calibration model sluice in numerical simulation |
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