Testing device for measuring plane global frictional force vector field, and working method

Abstract

The invention discloses a testing device for measuring a plane global frictional force vector field and a working method, relates to the field of aerodynamics, and can solve a problem of the measurement of the global frictional force vector field of a wall surface. The device comprises a downstream flat plate, a detachable black flat plate, a calibration line, a support, a light source, a movablehinge, an angle scale, a rotatable cantilever, an adjustable connecting rod, a camera connecting support, and a hinge connecting part. The device is simple in structure, and is convenient to operate and control. A tested flat plate serves as a part of a measurement part, so the device can achieve the integrated design of a measurement / flowing wall surface. Through the spraying of a liquid crystalcoating in a certain range, the device can achieve the measurement of a global frictional force field.

Description

technical field [0001] The invention belongs to the field of aerodynamics, and specifically refers to a test device and a working method for measuring the global friction vector field of a flat surface by using liquid crystal coating technology. Background technique [0002] The friction between the airflow and the wall is an important parameter in the field of aerodynamics. A lot of important information can be obtained through the friction of the wall, which is of great significance to the study of boundary layer theory and the mechanism and control of vortex motion. In practical engineering applications, accurate measurement of wall friction is also of great value. Accurate and fast measurement of wall friction plays a non-negligible role in the evaluation of aircraft flight performance. [0003] The traditional friction measurement technology mainly relies on mechanical or electronic devices, but these technologies have problems when measuring friction: First, the flow f...

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a test device and working method for measuring the plane global friction vector field, so as to solve the problem that the existing friction measurement technology cannot perform global measurement, the measurement process is cumbersome, and the Higher requirements for instrument design and installation

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