高速气流总温探针恢复特性评估技术研究  

Research on the recovery characteristics evaluation of total temperature probe in the high-speed airflow

作　　者：杨兆欣 顾正华[1] 张文清[1] Yang Zhaoxin;Gu Zhenghua;Zhang Wenqing(Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心设备设计及测试技术研究所,绵阳621000

出　　处：《仪器仪表学报》2021年第8期122-129,共8页Chinese Journal of Scientific Instrument

摘　　要：总温测试精度是风洞测试与控制系统的关键指标,技术指标可高达0.1℃。实现该指标主要考虑高速气流造成的总温测试速度误差。为了实现总温探针性能的可靠评估和测试误差高精度补偿,设计了一种双层滞止罩总温探针,提出了总温探针恢复系数估计方法,并在引导试验风洞上开展了验证试验。试验结果表明:所设计的双层滞止罩探针比传统总温探针受流场干扰更小、具有更稳定的测试性能,所提出的总温恢复系数估计方法可以有效补偿高速气流造成的速度误差,其中常规总温探针恢复系数评估方法比现行工程方法补偿精度可提高8倍。研究结果可以在空气动力学地面试验设备推广应用,为风洞温度测试技术的进步奠定坚实的技术基础。The total temperature measurement precision is a key index of the measurement and control system of the wind tunnel.The technical index requirement of total temperature measurement is up to 0.1℃,and the temperature measurement error with velocity is the main consideration of the index requirement.To achieve the reliable performance assessment of the total temperature probe and high precision compensation of the temperature measurement error with velocity,a total temperature probe with double stagnation cover is designed.The evaluation method of the recovery coefficient is proposed,and evaluation experiments are implemented in the pilot wind tunnel.Experimental results show that the total temperature probe with double stagnation hood is less disturbed by the flow field than the traditional total temperature probe.And the test performance is much more stable.The proposed method for the recovery coefficient could compensate the temperature measurement error due to the high-speed flow effectively.Compared with the current engineering method,the compensation accuracy of the proposed evaluation method for the traditional total temperature probe recovery coefficient is 8 times higher.The research results can be applied to the aerodynamics geoclimatic test facilities,which provide good fundaments for the progress of the measurement technology of the wind tunnel.

关 键 词：气流总温 高速气流 精细化测试 速度误差 

分 类 号：TH81[机械工程—仪器科学与技术] V211.71[机械工程—精密仪器及机械]