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Method and device for measuring cavitation additional action moment in water tunnel experiment

A technology of acting torque and measuring device, which is applied in the fields of water conservancy and hydropower engineering and marine ship engineering, can solve the problems of relatively few researches on the measurement and analysis of the additional acting force and the additional acting moment, so as to solve the problems of sealing and ventilation, and be easy to disassemble. and mobile, space-saving effects

Active Publication Date: 2021-02-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the research on underwater moving objects is to explore its comprehensive mechanical properties, and there are relatively few studies on the measurement and analysis of the additional force and additional torque caused by the change of the working medium.

Method used

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  • Method and device for measuring cavitation additional action moment in water tunnel experiment
  • Method and device for measuring cavitation additional action moment in water tunnel experiment
  • Method and device for measuring cavitation additional action moment in water tunnel experiment

Examples

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Embodiment 1

[0041] A cavitation additional action torque measurement device for water tunnel experiments, including a support system, a power device, a measurement device, and a ventilation transmission mechanism, such as figure 1 shown;

[0042] The support system is a support plate 12;

[0043] Described power unit comprises planar link mechanism, stepper motor 18 and speed reducer 17;

[0044] The planar link mechanism 7, 14, 15 and 16 is defined as a transmission disc 16, a connecting rod 15 and a guide rod 14 in turn from the power end, wherein one end of the guide rod is a semicircular bracket 7 with a bolt connection hole, and the half The circular size is the same as the outer diameter of the hollow shaft with flange, the bracket 7 is lined with rubber bushing, and the components are connected by hinges;

[0045] The ventilation transmission mechanism includes a first flanged hollow stepped shaft 1, a first sleeve nut 2, a first sleeve 4, a first ventilation connecting rod 5, a ...

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Abstract

The invention relates to a method and device for measuring cavitation additional action moment for water tunnel experiments, belonging to the technical fields of water conservancy and hydropower engineering and ocean ship engineering. The invention can realize the adjustment of different cavitation states, and can realize accurate measurement of the additional moment of the moving object in the water area under the cavitation state. Through the experimental device with symmetrical structure, the same power source is used to drive the experimental model in the water and the control model in the air to achieve the same vibration and motion state; the torque sensor is used to measure the comprehensive torque value of the experimental model and the control model in the cavitation state of the water area. The integrated torque value in the air, through the difference of the measured value, can accurately obtain the additional acting torque of the object moving in the water under different cavitation states.

Description

technical field [0001] The invention relates to a method and device for measuring cavitation additional action moment for water tunnel experiments, belonging to the technical fields of water conservancy and hydropower engineering and ocean ship engineering. Background technique [0002] The physical properties of water and gas are very different. Compared with the movement in the air medium, when the object moves in the water area, due to the higher density and viscosity of the working medium, it will receive an additional force that cannot be ignored. Especially when the local pressure in the water area near the moving object is reduced to the saturated vapor pressure of the liquid, cavitation will occur. Cavitation is a ubiquitous physical phenomenon in the technical fields of hydraulic engineering, marine ships and underwater vehicles. According to the differences in water flow velocity, pressure, and gas content in the liquid, the flow field near the moving object in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00G01L5/00
CPCG01L5/0042G01M10/00
Inventor 黄彪田北晨刘涛涛吴钦
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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