基于可压缩流体的热线探针校准风洞研制  

Development of hot-wire probe calibration wind tunnel based on compressible fluid

作　　者：马护生[1] 刘会龙[1] 秦天超[1] 杜炜[1] 时培杰[1] 任思源[1] 

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《实验流体力学》2017年第1期93-99,共7页Journal of Experiments in Fluid Mechanics

摘　　要：在可压缩流体中利用热线技术进行湍流度测量时,其输出不仅与脉动速度有关,也和流体温度、密度紧密相关。因此,需要建立与高速可压缩流体特征相似的校准装置,在使用前对热线探针进行准确校准。基于亚跨声速可压缩流体,对热线探针校准风洞的气动总体方案、关键结构设计、测控处系统研制等做了介绍和说明。风洞流场校测结果表明,模型区Ma最大偏差0.002,风洞速压可以降低至常规速压的50%以下,也可增至常规速压的1.7倍以上,温度和密度调节范围宽,流场均匀性好,满足热线探针校准需求。The output of the hot-wire is related not only to the fluctuation velocity,but also to the fluid temperature and density when the hot-wire technology is used to measure the turbulence intensity in a compressible fluid.Therefore,it is necessary to establish a calibration facility with similar characteristics to a high speed compressible fluid so that the accurate calibration of the hot-wire probe can be done before its usage.In this paper,the aerodynamic overall scheme,structural design and development of measurement and control system of the hot-wire probe calibration wind tunnel are introduced and illustrated based on subsonic and transonic compressible fluids.According to the results of the wind tunnel flow field calibration tests,the maximum deviation of the Mach number in the model area is 0.002;the dynamic pressure can be adjusted from0.5to 1.7times of the normal dynamic pressure;the variation range of temperature and density is wide;the uniformity of the flow field are good.All the requirements for the hot-wire probe calibration are satisfied.

关 键 词：可压缩流体 热线探针 校准风洞 流场校测 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]