风洞流场校测中测试排架对方向场影响的研究  

Influence study of flow angularity on measuring device in wind tunnel flow field calibration

作　　者：丛成华 赵芳[2] 易星佑 余永生[2] 王宁[2] CONG Chenghua;ZHAO Fang;YI Xingyou;YU Yongsheng;WANG Ning(Key Laboratory of Unsteady Aerodynamics and Flow Control,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China)

机构地区：[1]南京航空航天大学非定常空气动力学与流动控制工业和信息化部重点实验室,南京210016 [2]中国空气动力研究与发展中心设备设计与测试技术研究所,四川绵阳621000

出　　处：《航空动力学报》2024年第9期134-139,共6页Journal of Aerospace Power

基　　金：江苏高校优势学科建设工程资助项目。

摘　　要：为确定排架设计参数对低速风洞流场校测中方向场局部气流偏角的影响,采用数值模拟与试验对比验证的方式进行了研究,证明当前所采用的方法能够对排架设计参数进行有效评估。采用该数值模拟方法,针对排架的阻塞度、偏离试验段轴线距离、安装角度以及方向场探针的长度等参数,对局部气流偏角测量的影响进行了分析,得到了影响规律,并建立了影响模型。结果表明:排架的阻塞度、排架偏离试验段轴线距离以及方向场探针的长度对局部气流偏角的测试影响明显;如排架气动尺寸或测试方法设计不当,将导致测试结果与真实结果差异较大,得到错误的风洞方向场品质的评估结果。In order to determine the influence of flow angularity on design parameters of measuring device in low speed wind tunnel flow field calibration,wind tunnel experiment and numerical simulation were conducted to prove the feasibility of the adopted method of assessment.Numerical simulation method was carried out to study the influence of local flow angularity on measuring device blockage,offset,angle of attack and probe length.The law of influence was obtained and the mathematical model of influence was established.The results showed that:the angle of attack,the offset of measuring device and the length of probe have obvious influence on the local flow angularity experiment results,if the measuring device or test method was not properly designed,the error of flow angularity test results could be too large,even leading to wrong experimental conclusion about flow angularity.

关 键 词：低速风洞 方向场 测试排架 干扰 流场校测 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]