Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object

A non-smooth surface, wind resistance coefficient technology, used in measuring devices, testing of machine/structural components, instruments, etc., can solve the problems of complex wind tunnel structure, long test cycle, large space occupation, etc., to achieve simple device structure, avoid Test equipment, small error effect

Inactive Publication Date: 2014-03-12
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing main resistance measurement method is to use a balance to perform a force measurement experiment in a wind tunnel. However,...

Method used

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  • Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object
  • Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object

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Embodiment

[0026] Such as figure 1 shown. The resistance measuring device for measuring the drag coefficient of non-smooth surface objects in the present invention includes a dynamometer connecting shaft 11, an air inlet section 1, a test observation section 3, and a diversion air grid arranged between the air inlet section 1 and the test observation section 3 2; An anemometer 10 is installed in the test observation section 3 .

[0027] The connection parts between the air inlet section 1, the diversion grille 2 and the test observation section 3 are not sealed.

[0028] The diversion air grid 2 is composed of several identical circular tube bundles, which play the role of diversion and diversion. Since the diameters of each diversion circular tube are consistent, the air flow rates passing through each diversion circular tube are basically the same. During the test, the fan 13 sucks in the external air, and the chaotic air passes through the diversion grille 2 and diverges to form mu...

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Abstract

The invention discloses a resistance measuring device and method for measuring the wind resistance factor of a non-smooth surface object. The device comprises a dynamometer connecting shaft, a wind inlet section, a wind meter, a fan, a test observation section and a flow guide wind grid arranged between the wind inlet section and the test observation section; the test observation section is provided with two guide rails; the dynamometer connecting shaft penetrates through the wind inlet section and the test observation section; during the test, the non-smooth surface object is placed on the dual guide rails firstly, and one end of a stay wire is tied and suspended on a hook of the dynamometer connecting shaft; then the fan is electrified to suck external air, the air is shunted by the flow guide wind grid and is exhausted after passing by the non-smooth surface object; meanwhile, the non-smooth surface object moves on the dual guide rails along the horizontal direction, when the dynamometer connecting shaft horizontally moves as the non-smooth surface object is subjected to the resistance of the air flow, the dynamometer connecting shaft can pulls a digital dynamometer to test the magnitude of the wind resistance applied to the non-smooth surface object. The resistance measuring device is simple in structure, the test means is simple, convenient and fast and the errors are smaller.

Description

technical field [0001] The invention relates to a wind resistance measuring device on the surface of a microscopic shape object, in particular to a resistance measuring device and a method for measuring the wind resistance coefficient of an object with a non-smooth surface. Background technique [0002] The car body of the van transport vehicle is an independent cuboid structure, and the car body is long. During the driving process, the wind resistance on the surface of the van body is relatively large, and the large wind resistance means that the van transport vehicle consumes more energy. energy of. Relevant studies have shown that grooved surfaces with different microstructures have different drag reduction effects. If a grooved surface structure with the best drag reduction can be selected from many non-smooth microstructured surfaces and applied to a van On the surface of the box body, the drag reduction efficiency of the box body surface of the van transport vehicle c...

Claims

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Application Information

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IPC IPC(8): G01M9/00G01M9/06
Inventor 谢小鹏曹立峰曾建豪黄恒刘奕敏
Owner SOUTH CHINA UNIV OF TECH
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