Test device and test method of occurrence and movement rule of temperature difference flow backward density current

A test device and technology of movement law, applied in the field of test device for the occurrence and movement law of temperature difference backflow hyperpycnal flow. The effect of less equipment cost

Inactive Publication Date: 2013-01-09
CHINA THREE GORGES UNIV
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Problems solved by technology

Due to the prevalence and scale of anti-slope hyperpycnal currents are not as extensive as...

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  • Test device and test method of occurrence and movement rule of temperature difference flow backward density current
  • Test device and test method of occurrence and movement rule of temperature difference flow backward density current
  • Test device and test method of occurrence and movement rule of temperature difference flow backward density current

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[0038] exist figure 1 Among them, the test tank 1 is 1000 cm long and 30 cm wide. The test tank consists of three parts: the inlet section (simulating the main stream of the Yangtze River), the observation section (simulating the typical tributary bay) and the tailwater section. Among them, the water inlet section is 150 cm long, and a plexiglass partition 3 is set between the water inlet section and the observation section (simulating the intersection of a typical tributary reservoir bay and the main stream of the Yangtze River), and the plexiglass partition 3 can move up and down smoothly; in addition, An energy dissipation grid is installed at the water inlet where the water inlet section connects with the water tank or water tower, so that the inflow is stable. The total length of the observation section is 421 cm, and it is divided into eight observation sections a, b, c, d, e, f, g, and h, respectively arranged at 71, 121, 171, 221, 271, 321, 371 and 421 cm from the pa...

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Abstract

The invention relates to a test device and a test method of the occurrence and movement rule of temperature difference flow backward density current. A transparent glass straightway rectangular section adverse grade open channel trough is mainly constructed, and corresponding cold and hot water preparation systems and a water inlet power device are matched. A current meter and a temperature recorder are erected on an observation section of the test trough, and a video camera is helps to capture in a movement manner and is combined with a camera on a fixed position to form an observing system to monitor the submerging point and head part of flow backward density current, the hydraulics in the moving process and the temperature parameter. By adopting the device and the method, the shortage in the outdoor monitoring timeliness and synchronism can be overcome, background understanding and data support can be supplied for further numerical simulation analysis, and the support is supplied for deepening the understanding of the flow backward density current of a tributary reservoir and the water bloom mechanism based on the water dynamic property and changing the water power condition of a tributary through ecological scheduling of the reservoir to improve the quality of water in the reservoir and avoid water bloom.

Description

technical field [0001] The invention relates to a test device and method for the occurrence and movement law of temperature-difference backflow and density flow. Background technique [0002] Hyperpycnal flow has been discovered and studied for a long time, and it can be divided into down-slope hyperpycnal flow and anti-slope hyperpycnal flow according to the direction of its bottom slope relative to the movement of hyperpycnal flow. So far, domestic and foreign scholars have carried out a lot of research on down-slope hyperpycnal flow from theoretical analysis, model test to numerical simulation, etc., and the results have also been widely used in engineering practice and achieved remarkable benefits. Because the prevalence and scale of anti-slope hyperpycnal currents are not as extensive as those of down-slope hyperpycnal currents, so far there are few studies on anti-slope hyperpycnal currents. In the long-term study of the Three Gorges Reservoir and typical tributary ba...

Claims

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Application Information

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IPC IPC(8): G01M10/00E02B1/02
Inventor 刘德富纪道斌曹巧丽杨正健黄钰铃马骏胡念三
Owner CHINA THREE GORGES UNIV
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