超音速条件下K型温度传感器恢复特性数值模拟

航空航天领域中,高速条件下气流温度的测量存在着动态误差和稳态误差。本次研究对超音速条件下K型温度传感器的恢复特性进行了数值模拟研究,对影响恢复特性的关键影响量进行了分析,确定了超音速条件下温度传感器恢复特性理论模型,为温度传感器的实验和设计提供了理论基础。研究结果表明:超音速条件下影响温度传感器恢复特性的关键影响量中,单屏蔽式结构、总温和马赫数对于传感器恢复系数的提升帮助很大,传感器外径尺寸、静压对于温度传感器的恢复系数影响很小。

Numerical Simulation of Recovery Characteristics for K Type Temperature Sensor in the Supersonic Condition

In the field of aerospace, the measurement of airflow temperature has the dynamic error and the steady state errorat high speed.Numerical simulation research is used to investigate the recovery characteristics for K type temperature sensor in the supersonic condition. The key influential factorsof recovery characteristics are analyzed.The recovery characteristic model for temperature sensor under the supersonic condition is established.It provides the theoretical basis for the experiment and design of the temperature sensor. The result shows thatamong those key influential factors,the single shielded temperature sensor,total temperature and Mach numberare very helpful to improve the recoverycoefficient,the outside diameter of sensor and static pressure help to improve the recovery coefficient very small.