Testing device and method for measuring wind drag of automobile model

Abstract

The invention discloses a testing device and method for measuring wind drag of an automobile model. The device comprises a wind cylinder, a guide post and a dynamometer, wherein the wind cylinder comprises a front section, a middle section and a rear section which are sequentially butted with one another; a first guide sleeve and a movable door are arranged on the end wall of the front section; the bottom of the front section is provided with an air inlet; a second guide sleeve and an air outlet are arranged on the end wall of the rear section; the two ends of the guide post are arranged in the wind cylinder through the first guide sleeve and the second guide sleeve; a hook for fixing the automobile model is arranged on the guide post in the middle section; and the traction end of the guide post is connected with the dynamometer. The automobile model is blocked by simulated wind, and thrust generated by the simulated wind is transmitted to the guide post, so that the guide post moves to the axial direction of the rear section, and then data on the wind drag of the automobile model are measured by the dynamometer connected with the traction end. The testing process is convenient and easy to operate, a wind tunnel test with complicated operation is replaced, and high-cost and complex testing equipment and means of the wind cylinder test are avoided.

Description

technical field [0001] The invention relates to the field of wind resistance measurement, in particular to a test device and a test method for measuring the wind resistance of a car model. Background technique [0002] Aiming at the problem of measuring the wind resistance of a car model during motion, many scholars have proposed their own methods for testing wind resistance. The main method currently used to test wind resistance is the wind tunnel test method. The wind tunnel test method is a method of simulating the air resistance encountered by a car during motion. The wind tunnel test device is mainly composed of several parts such as a stable section, a contraction section, a test section and a diffusion section. Due to the high cost of building wind tunnel test facilities and the need for more testing instruments in the testing process, the current testing instruments mainly include: three-dimensional hot-wire anemometer, aerodynamic balance, sensors and data acquisi...

AI Technical Summary

Problems solved by technology

In addition, the testing process of the wind tunnel test method is relatively complicated, and it takes a long time to conduct a wind tunnel test. When conducting wind tunnel tests on multiple car models with different surface shapes, it will take a long time, resulting in low test efficiency

Due to the high cost and other issues, the wind tunnel test method is greatly restricted in the promotion and popularization of the current wind resistance test

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