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An Experimental System for Simulating Stratified Water Flow

A stratified flow, experimental system technology, used in fluid dynamics tests, hydraulic models, testing of machine/structural components, etc. question

Inactive Publication Date: 2015-09-09
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above method can form the vertical distribution of water temperature in the initial stage, once the water intake starts and the flow state is formed in the reservoir, the vertical distribution of water temperature will change again, and at the same time, the water body in the reservoir will gradually decrease.
During the simulation process, the water temperature-flow field cannot reach a stable state, and the duration is relatively short, so it is still impossible to simulate the stratified flow process caused by water intake at the water inlet in a large-scale water temperature stratified reservoir, that is, it is impossible to simulate the dynamic flow field for a long time The stable stratified temperature field of

Method used

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  • An Experimental System for Simulating Stratified Water Flow
  • An Experimental System for Simulating Stratified Water Flow
  • An Experimental System for Simulating Stratified Water Flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment is an experimental system for simulating the stratified flow of water temperature, such as figure 1 , 2 shown. This embodiment includes: a circulating reservoir 1, said circulating reservoir is provided with at least one water pump 2 with a water supply pipe and a water inlet valve 15, and said water supply pipe is sequentially connected with water supply area I, heating area II, and test area III , discharge area Ⅳ ( figure 1 Each dotted line box) is connected, and the discharge area is connected with the circulating reservoir; the water supply area is provided with a water supply forebay 14 with a water supply overflow weir 1401 for controlling the water level; the water supply forebay is provided with at least A water flow driver 13 with a water spray pipe 1301, a deflector 1302 and a water inlet grille 1303; the heating zone is provided with at least one layered baffle 302 and multi-layered baffles distributed between the layered baffles. An elect...

Embodiment 2

[0038] This embodiment is an improvement of the first embodiment, and it is a refinement of the first embodiment about the test area. The outlet of the electric heating box described in this embodiment is provided with a figure-eight flared deflector.

[0039] The diffusion area formed by the flaring deflector makes the water flow form a uniform diffusion shape when it flows out of the electric heating box, forming a wide water flow field. When there are multiple electric heating boxes, the flaring deflector can prevent the backflow vortex between the side-by-side electric heating boxes, and smoothly form a stable stratified flow field. The length of the diffusion zone of the deflector is generally not less than twice the width of the experimental pool.

[0040] Examples of simulation experiments:

[0041] In order to simulate the change of water temperature distribution in the reservoir area and the temperature of water intake under the condition of water intake at the wate...

Embodiment 3

[0046] This embodiment is an improvement of the second embodiment, which is the refinement of the second embodiment about the water flow driver and the electric heating box, such as image 3 shown. Three water flow stratifiers are set in the water inlet forebay described in this embodiment, and the three water flow stratifiers are respectively connected with their own electric heating boxes, and the three electric heating boxes are respectively provided with their own flared flow guides plate.

[0047] Three water flow stratifiers are in a water supply forebay, and there are three water spray pipes for water supply. Three water spray pipes can use a water pump for water supply, and also can use three water pumps respectively. The ends of the flared deflectors provided at the outlets of the three electric heating boxes are sequentially connected, so that the three streams flowing out of the electric heating boxes can be smoothly brought together to maintain a stratified flow ...

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Abstract

The invention relates to an experiment system and method for stimulating thermally-stratified flow. The method includes the steps that an initial stable flow field is formed; an initial stable thermally-stratified temperature field is formed; an initial discharge temperature field is monitored; an experiment is carried out. According to the method, the level of water and the flow field in an experiment water tank are regulated and controlled through the height of an inlet water overflow weir and a discharge valve, and a three-dimensional temperature field of water in the experiment water tank is regulated and controlled by regulating the number of electrical heating rods which are switched on and the number of electrical heating rods which are switched off. Compared with the prior art, by means of the system and method, the temperature fields and the flow field can be regulated in real time, the dynamic simulation experiment can be carried out, the defect that a stable stratified temperature field in a dynamic flow field can not be simulated for a long time in the prior art is overcome, and the experiment of simulating thermally-stratified flow under the steady-state condition can be directly carried out.

Description

technical field [0001] The present invention relates to an experimental system and method for simulating the stratified flow of water temperature, which is an environmental protection ecological hydraulic experiment system and method, and a simulation experiment for water flow and water temperature change of reservoirs and deep-water rivers from shallow to deep systems and methods. Background technique [0002] Engineering practice shows that well-adjustable reservoirs show different degrees of water temperature stratification in the direction of water depth in front of the dam. At the same time, in order to ensure power generation and industrial and agricultural water diversion, the water inlet of the reservoir is required to have a certain submerged depth. In the case of obvious water temperature stratification, the temperature of the discharged water is significantly lower than that of the natural river before the dam is built, which will bring a series of low-temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00E02B1/02
Inventor 刘之平孙双科柳海涛郑铁刚姜涵吕强边永欢张国强樊书刚
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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