实验流体力学2013，Vol.27Issue(4)：71-77,7.
风洞试验中测压管路信号畸变及修正研究
Study on correction and distortion effects caused by tubing systems of pressure measurements in wind tunnel
摘要
Abstract
The distortion effects caused by simple tubing systems of pressure measurements are analyzed via distributed friction model and fluctuating pressure testing.Advantages and disadvantages of mathematical and mechanical methods for correcting the distorted fluctuating pressures are described.The effects of different parameters and tube connecting,bending,extruding on transfer function of tubing system are discussed.The new idea of acoustic resonances utilization,which improve signal to noise ratio,is proposed.According to acoustic resonances utilization,the tubing systems selection and quantitative evaluation criteria are provided in this paper.The results show that distributed friction model is a feasible approach for correcting the distorted fluctuating pressures.The effect of tube connecting in the same internal diameter,slight bending and extruding on transfer function of tubing system can be neglected.According to the quantitative evaluation criteria proposed in this paper,the tubing system is selected effectively.关键词
风洞试验/管路系统/畸变效应/脉动压力畸变修正Key words
wind tunnel test / tubing systems/ distortion effects/ correction of distorted fluctuating pressure分类
建筑与水利引用本文复制引用
马文勇,刘庆宽,刘小兵,尉耀元..风洞试验中测压管路信号畸变及修正研究[J].实验流体力学,2013,27(4):71-77,7.基金项目
国家自然科学基金青年项目(51108280) （51108280）
