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Flat plate wall fluid friction resistance mensuring device based on open circulation

A technology of fluid friction and measuring devices, which is applied in measuring devices, fluid dynamics tests, and testing of machine/structural components, etc. It can solve the problems of not measuring single-measurement wall resistance, large test model size, and difficult production, etc., to achieve measurement Reliable, easy to operate and control, convenient card installation effect

Inactive Publication Date: 2006-06-28
TSINGHUA UNIV
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  • Claims
  • Application Information

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Problems solved by technology

From the point of view of the test piece and function, the whole test piece is in the fluid. Although large water holes and drag pools can measure resistance, flow field, pressure, etc., the test models are generally large in size, difficult to manufacture, and costly. while some small-scale special devices use fluid as the research object, while others use the entire pipeline or a certain part of the pipeline as the research object
In terms of measurement methods of fluid resistance, there are direct measurement by multi-component balance, pressure drop measurement, and indirect calculation by flow velocity distribution; however, a single measurement of wall resistance is generally not measured

Method used

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  • Flat plate wall fluid friction resistance mensuring device based on open circulation
  • Flat plate wall fluid friction resistance mensuring device based on open circulation

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Embodiment Construction

[0015] The flat wall fluid frictional resistance measurement device based on the open cycle proposed by the present invention has a structure such as figure 1 shown. It includes a pool 2, a buffer tank 6, a water flow pipeline and a load cell 14. The water inlet end of the buffer water tank 6 communicates with the pool 2 through the water pump 1 and the pipeline. The buffer water tank is provided with a partition 4, and the partition 4 is provided with a round hole. The water outlet of the buffer water tank 6 passes through the guide provided in the buffer water tank The flow pipe 9 communicates with the water flow pipeline, and the water flow pipeline communicates with the pool 2 through the elbow 13 . The water flow pipeline is composed of a variable diameter section 10, a development section 11 and an experimental section 12. The experimental section 12 has a rectangular cross-section, and the tested flat test piece 18 is placed in the experimental section 12 and becomes t...

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Abstract

A measuring device of fluid frictional resistance on flat plate wall surface is prepared as connecting buffer water tank to water pool and to water flow pipe separately; connecting water flow pipe to water pool through elbow; forming water flow pipe by reducing section, developing section and testing section with rectangular cross ¿C section; placing flat plate to be measured in testing section and using flat plate as plate wall of testing section for carrying out frictional resistance test on wall surface.

Description

technical field [0001] The invention relates to an open cycle-based measuring device for fluid friction resistance on a flat wall surface, which is used for measuring fluid friction resistance on a flat wall surface at a flow rate of 0 to 15 m / s, and belongs to the technical field of hydrodynamic testing. Background technique [0002] In the occasions of fluid pipeline flow, hydraulic machinery, and underwater vehicles, the frictional resistance between the fluid and the solid wall is an important factor affecting energy consumption and work efficiency. The surface properties of solids, including geometrical and physicochemical properties, largely affect the solid-liquid interface friction. Carrying out research in this area is of great significance for saving energy, improving working conditions, and improving work efficiency. [0003] At present, the measurement of the resistance (including body resistance and frictional resistance, etc.) suffered by objects in flowing fl...

Claims

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Application Information

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IPC IPC(8): G01M10/00
Inventor 周刚邵天敏陈大融
Owner TSINGHUA UNIV
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