七孔探针可压缩流场测量研究  

Study of Compressible Flow Measurement based on Seven-Hole Probe

作　　者：白亚磊[1] 明晓[1] 丁涛[2] 

机构地区：[1]南京航空航天大学,江苏210016 [2]成都飞机设计研究所,四川610041

出　　处：《实验力学》2010年第6期667-672,共6页Journal of Experimental Mechanics

基　　金：国家973项目(2007CB714600)资助

摘　　要：介绍了七孔探针用于亚音速可压缩流的标定方法。作为一种可以同时获得流动速度大小、流动偏角、总压和静压的气动测量装置,七孔探针被广泛应用于各种流动测量,包括可压缩流动。但是它的校准过程周期很长,代价昂贵,影响了探针的推广。本文以数值计算为手段,对七孔探针进行亚音速可压缩流校准与测量的研究。结果表明,其校准拟合精度流动角为2%,内外区的总静压相对标准偏差都没有超过3%,高于相同状态下的实验校准精度。在实际应用中,本方法用于指导传统实验标定方法,可以节约大量的标定时间和成本,使七孔探针在亚音速可压缩流的测量变得简单可行。This paper presents a calibrating method of measuring relative flow velocity,flow angle,local total and static pressure for subsonic compressible flows using seven-hole probe. Seven-hole probe （SHP） is a device that can simultaneously measure the pressure and velocity of a steady flow,especially the parameters of compressible flow. However,the costly and time-consuming calibration impedes its extensive application. Study of calibration and measurement method for compressible flow was carried out using seven-hole probe （SHP） based on the data from numerical simulation. Results show that the accuracy of calibration fitting of flow angle is about 2%,the relative value of both total pressure and static pressure are less than 3%. These results are better than experimental calibration accuracy in the same situation. In practice,this method is used to replace or guide traditional experimental calibration method,it can save a lot of calibration time and cost,so that seven-hole probe measurement for subsonic compressible flow has become simple and feasible.

关 键 词：七孔探针 计算流体力学 可压缩流测量 数值校准 

分 类 号：TB937[一般工业技术—计量学]