高速平板模型壁面剪切应力数值模拟研究  

Numerical simulation of wall shear stress of a supersonic plate model

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作  者:付政伟 杨水旺 张琦 江宇璇 陈小婷 Fu Zhengwei;Yang Shuiwang;Zhang Qi;Jiang Yuxuan;Chen Xiaoting(Beijing Zhenxing Institute of Metrology and Measurement,Beijing 100074,China)

机构地区:[1]北京振兴计量测试研究所,北京100074

出  处:《空天技术》2025年第1期59-67,共9页Aerospace Technology

基  金:北京振兴计量测试研究所青年创新项目(99300004636)。

摘  要:针对高速飞行器壁面剪切应力测量试验环境以及壁面剪切应力传感器的精度影响因素,采用经典的楔形平板模型作为计算模型,利用ANSYS Fluent流体仿真软件对MEMS浮动元件壁面剪切应力传感器在Ma=6的高速流体中的试验环境进行仿真计算,确定壁面剪切应力传感器的量程为0~100 Pa、分辨率为1 Pa,为传感器测量壁面剪切应力以及确定传感器的设计指标提供参考依据。此外,研究壁面剪切应力传感器的浮动元件间的移动间隙、浮动元件与待测壁面的平齐度对壁面剪切应力测量的影响规律,确定移动间隙应控制在0.1 mm以内、平齐度下凹不超过0.03 mm,为壁面剪切应力传感器的装配工艺提供参考。Aiming at the test environment of wall shear stress measurement of supersonic vehicle and the factors affecting the accuracy of wall shear stress sensors,the classic wedge plate was adopted as the calculation model,and the test environment of MEMS floating element(MEMS-FE)wall shear stress sensor in high-speed fluid of Ma=6 was simulated by using ANSYS Fluent fluid simulation software.The measurement range of the MEMS-FE wall shear stress sensor is 0~100 Pa and the resolution is 1 Pa,which provides a reference for the load calculation of MEMS-FE wall shear stress sensor and the performance design index of MEMS-FE wall shear stress sensor.In addition,the influence of the moving clearance between the floating elements of the MEMS-FE wall shear stress sensor and the depth between the floating elements and the wall surface to be measured on the wall shear stress measurement is studied,and the moving clearance of the floating elements should be controlled within 0.1mm.At the same time,the floating element should be avoided to form a reverse step,and the depth of the floating element should be controlled to no more than 0.03mm,which provides a reference for the process control of MEMS wall shear stress sensors.

关 键 词:高速平板模型 壁面剪切应力测量 MEMS传感器 CFD 

分 类 号:TB9[一般工业技术—计量学] TH823[机械工程—测试计量技术及仪器]

 

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