Aerostatic calibrating system for wall surface shearing strength micro-sensors

A micro-sensor, static calibration technology, applied in instruments, measuring fluid pressure, measuring devices, etc., can solve the problems of small shear stress range, complex flow field state, large volume, etc., and achieve the effect of reducing economic costs

Inactive Publication Date: 2019-03-15
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] Commonly used static calibration systems in air include flat-plate model calibration system and rotary motion calibration system, but the flat-plate model calibration system needs to rely on the wind tunnel, and the flow field state of the flat plate boundary layer is not easy to control; the shear stress range generated by the rotary motion calibration system is relat

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  • Aerostatic calibrating system for wall surface shearing strength micro-sensors
  • Aerostatic calibrating system for wall surface shearing strength micro-sensors
  • Aerostatic calibrating system for wall surface shearing strength micro-sensors

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[0040] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific examples, but the implementation of the present invention is not limited thereto.

[0042] The first embodiment of the present application relates to a static calibration system in air for wall shear stress microsensors, figure 1 It is a structural diagram of a static calibration system in air for wall shear stress microsensors in the embodiment of the present invention. Such as figure 1 As shown, the calib...

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Abstract

The invention relates to an aerostatic calibrating system for a wall surface shearing strength micro-sensor. The aerostatic calibrating system comprises a miniature pressure difference pipeline (8). The miniature pressure difference pipeline (8) is connected with an air source device (1) through an air inlet pipeline (3), connected with a pressure measuring system (4) through a plurality of pressure measuring pipelines (5), and connected with an air outlet pipeline (7). The calibrating system has the advantages of being small in size and convenient to carry and can be suitable for aerostatic calibration of a plurality of flexible hot film shearing strength micro-sensors and floating type shearing strength micro-sensors.

Description

technical field [0001] The invention belongs to the field of fluid mechanics, and in particular relates to a static calibration system in air used for wall shear stress microsensors. Background technique [0002] The shear stress generated by the fluid flowing through the surface of the object is the fluid wall shear stress. The fluid wall shear stress is an important physical quantity to study the flow state of the boundary layer, and it is also an important basis for mastering and controlling the frictional resistance of the wall. In the fields of aviation and aerospace, the study of fluid wall shear stress is of great significance to the design of drag reduction and noise reduction of advanced aerospace vehicles, and the optimization design of high maneuverability. [0003] Compared with traditional shear stress measurement devices such as Princeton tubes and two-way diaphragms, microsensors such as flexible thermal film shear stress microsensors and floating shear stress...

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Application Information

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IPC IPC(8): G01L27/00
CPCG01L27/002
Inventor 马炳和苑伟政邓进军罗剑郑少军严宇超陈润博
Owner NORTHWESTERN POLYTECHNICAL UNIV
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