基于激波原理的气体动态温度校准装置研究  

Study on gas dynamic temperature calibration device based on shock tube principle

作　　者：杨兆欣 顾正华[1] 张文清[1] 曾星 Yang Zhaoxin;Gu Zhenghua;Zhang Wenqing;Zeng Xing(Facility Design and Instrumentation Institute of 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与测试技术研究所,绵阳621000

出　　处：《仪器仪表学报》2022年第5期23-31,共9页Chinese Journal of Scientific Instrument

摘　　要：基于气体介质动态温度校准需求,研制了一套基于激波原理的气体动态温度校准装置。针对传统激波管产生激波持续时间短无法激励温度传感器的问题,通过改造传统激波管结构,实现了激波过程后稳态温度气体持续流动,克服了传感器有效激励问题。为了实现快速响应温度传感器的高质量动态校准,通过激波过程温度幅值补偿研究,减小了温度幅值不稳定对于动态校准结果的影响。此外,通过激波非定常边界层对于温度的影响分析,得到了忽略温度随壁面参数变化的条件,提高了激励信号发生的可靠性。最后,基于试验手段对于校准装置的可溯源性进行了分析和验证,试验结果表明所研制的气体动态温度校准装置可以产生阶跃上升时间为1.6 ms,稳态幅值为320℃,持续时间为40 s的动态温度激励信号,基本满足温度传感器动态校准需求。According to the requirement of the gas medium dynamic temperature calibration,a set of gas-dynamic temperature calibration devices based on the shock tube principle is developed.In terms of the issue that the temperature sensors cannot be excited by the shock tube due to the short duration of the shock wave,the traditional structure of the shock tube is reformed in this article.As a result,the continuous flow with the steady temperature after the shock wave procedure is realized,and the effective excitation problem of the sensor is solved.To realize the high-quality dynamic calibration for the rapid response temperature sensors,the impact of temperature amplitude instability on the dynamic calibration results is reduced by the research of temperature amplitude compensation technology during the shock wave procedure.In addition,through the analysis of the influence of shock wave unsteady boundary layer on the temperature,the condition of ignoring the change of temperature with wall parameters is obtained,which improves the reliability of excitation signal generation.In the end,the traceability of the calibration device is analyzed and evaluated with the experiments,which shows that the proposed gas dynamic temperature calibration device can generate the temperature excitation signals with the step rise time of 1.6 ms,a steady step amplitude of 320℃,and duration of 40 s,which satisfy the dynamic calibration requirements of the temperature sensors.

关 键 词：动态温度 校准装置 激波管 气体介质 

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]