现场参考气流高温传感器最佳内流速度计算  

Calcultion of optimum inner flow velocity of sitereference high temperature gas sensor

作　　者：赵俭[1] ZHAO Jian(Changcheng Institute of Metrology and Measurement,Aviation Industry Corporation of China,Limited,Beijing 100095,China)

机构地区：[1]中国航空工业集团有限公司、北京长城计量测试技术研究所,北京100095

出　　处：《航空动力学报》2023年第6期1281-1291,共11页Journal of Aerospace Power

基　　金：发动机专项研究计划。

摘　　要：为得到现场参考气流高温传感器的高准确设计结果,从支撑外壳温度、外屏温度、内屏温度、偶丝温度的模型与求解入手,通过关键参数预设与迭代,研究了传感器最佳内流速度计算方法,提出差商偏差判定法,解决了计算中边界条件不充分的问题。结果表明:在来流总温1717.5 K、来流静压0.5 MPa的条件下,双屏蔽L型现场参考气流高温传感器的最佳内屏内流速度和最佳环道内流速度分别为146.1、544.9 m/s。研究结果可为双屏蔽式、单屏蔽式等类型气流高温传感器的优化设计、理论分析等提供必要的支撑。In order to obtain high accuracy design result of site reference high temperature gas sensor,starting from the model and solution of temperatures of support housing,outer shield,inner shield and thermocouple wire,the computing method of optimum internal flow velocity of the sensor was studied through predetermination and iteration of key parameters.Difference quotient deviation judgment method was put forward,which solved the problem of insufficient boundary conditions during calculation.The result showed that optimum internal flow velocities of inner shield and annular channel of double shield L type site reference high temperature gas sensor were 146.1 m/s and 544.9 m/s,respectively,under the working condition of 1717.5 K total temperature and 0.5 MPa static pressure.The study results can provide necessary support for optimal design,theoretical analysis of high temperature gas sensors of double shield type,and single shield type,etc.

关 键 词：总温 气流高温 传感器 内流速度 测温偏差 

分 类 号：V24[航空宇航科学与技术—飞行器设计]