Detector for round cross section sample wall surface fluid friction resistance

A fluid friction, circular cross-section technology, used in measuring devices, fluid dynamics tests, testing of machine/structural components, etc., can solve problems such as inability to meet the needs of technological development, achieve simple structure, reduce impact, disassembly and assembly handy effect

Inactive Publication Date: 2007-10-10
TSINGHUA UNIV
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  • Summary
  • Abstract
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Problems solved by technology

Since the causes of the frictional resistance and differential pressure resistance that make up the total resistance are different, the technical approaches to reduce them must be different. Therefore, it is necessary to measure the frictional resistance and differential pressure resistance in actual analysis. Therefore, the traditional measurement of circular The measuring device of the total resistance of cross-sectional objects can no longer meet the needs of new technological development

Method used

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  • Detector for round cross section sample wall surface fluid friction resistance
  • Detector for round cross section sample wall surface fluid friction resistance
  • Detector for round cross section sample wall surface fluid friction resistance

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Embodiment Construction

[0014] The structure, principle and working process of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] The invention proposes a measuring device for fluid frictional resistance of a circular cross-section sample wall mainly comprising a model support unit and a resistance measuring unit. The model support unit comprises a streamlined model head 1, a support rod 16, a fixed frame 14, a front sliding support ring 2 and a rear sliding support ring 4 arranged on the support rod 16 for supporting the sample 3, and a streamlined model tail 12. The front end of the model head 1 and the support rod 16 adopts a detachable fixed connection, such as threaded or snap-fit ​​connection, etc. The model head 1 can be designed into different shapes and sizes according to experimental requirements, so as to form the required macro flow field. The front sliding support ring 2 is slidably matched with the smooth cylindrical section at...

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Abstract

A frictional resistance measurement device of wall-surface fluid on round section test sample consists of model support unit including model head, front slide support ring, back slide support ring, model tail, fixing frame and support rod; and resistance measurement unit including transmission ring, radial transmission pin, axial transmission pin, transducer support sheath, transducer and transducer base. It is featured a setting measured test sample to be cylindrical form, placing transducer in runner and leading signal line out through hole.

Description

technical field [0001] The invention relates to a measuring device for fluid friction resistance on the wall surface of a circular cross-section sample, which is used for measuring the fluid friction resistance on the wall surface of a circular cross-section sample at different flow rates, and belongs to the technical field of fluid dynamics testing. Background technique [0002] The main energy consumption of an underwater vehicle traveling in water is to overcome the traveling resistance, so resistance analysis and resistance reduction are of great significance for saving energy, improving working conditions and improving work efficiency. The travel resistance of underwater vehicles is mainly composed of frictional resistance and pressure difference resistance, of which frictional resistance accounts for the vast majority of the total resistance, especially for streamlined underwater vehicles, so the analysis and measurement of frictional resistance is the key to resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
Inventor 汪家道周刚邵天敏李昂陈大融
Owner TSINGHUA UNIV
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