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A model surface friction measuring device

A technology for measuring devices and models, applied in the directions of measuring devices, surface/boundary effects, instruments, etc., can solve problems such as inability to offset interference, and achieve the effects of ensuring measurement sensitivity, improving accuracy, and reducing uncertainty

Active Publication Date: 2019-12-13
中国空气动力研究与发展中心超高速空气动力研究所
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although this method can effectively offset the interference caused by the pressure, it cannot offset the interference of the additional torque on the friction measurement results due to the non-uniformity of the pressure distribution.

Method used

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  • A model surface friction measuring device
  • A model surface friction measuring device
  • A model surface friction measuring device

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Embodiment Construction

[0030] specific implementation plan

[0031] The technical solutions of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0032] Such as figure 1 As shown, the model surface friction measuring device of the present invention includes: a friction balance body 1 , a measuring head 4 , a piezoelectric sheet, a protective cover base 2 , a protective cover upper cover 3 and a heat insulating retaining ring 5 .

[0033] The friction balance body 1 is composed of a base 12 and a force-sensitive beam 7. The base 12 is provided with a pin hole 8 connected to the protective cover base 2 and a lead hole 9 for leading the signal line out of the model surface friction measurement device. Pasted on both sides of the force-sensitive beam 7, the head of the friction balance body 1 is provided with a measuring head installation groove 11.

[0034] The measuring head 4 is installed in the measuring head installation groove 11 on the ...

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Abstract

The invention provides a model surface friction measuring device, which comprises a friction balance main body, a measuring head, a piezoelectric sheet, a protection sleeve base, a protection sleeve upper cover and a heat insulation baffle ring, wherein the measuring head is fixedly connected onto the friction balance body; the piezoelectric sheet is pasted on a force sensitive beam of the friction resistance balance body; the protection sleeve base and the protection sleeve upper cover are fixedly connected to the outer part of the friction balance body for protecting the force sensitive beam structure of the friction balance body; the heat insulation baffle ring is arranged between the protection sleeve base and the protection sleeve upper cover, and is used for isolating high-temperature test airflow.

Description

technical field [0001] The invention relates to a measuring device for measuring the frictional resistance on the surface of an aircraft model due to the viscosity of the hypersonic airflow, which is used for measuring the frictional resistance of the airflow on the surface of the aircraft model in a hypersonic pulse wind tunnel test. Background technique [0002] Aircraft model surface friction measurement has high application value in aircraft layout research, drag reduction, structure and component optimization, flow control, CFD verification and confirmation, etc. Accurate measurement of frictional resistance plays an important role in improving the performance of aircraft and comprehensively understanding surface flow phenomena. Usually, in high-enthalpy pulse-type wind tunnel equipment (such as expansion tube wind tunnel, shock wave wind tunnel, etc.), friction balances are mostly used to measure the friction on the surface of aircraft models. The friction balances use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/0216
Inventor 吕治国赵荣娟黄军
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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