电弧加热发动机温度和速度的测量

Temperature and Velocity Measurements in Arcjets

本文着重介绍光谱辐射法、激光诱导荧光法、静电探针法等接触式和非接触式测量技术在电弧加热发动机 (Arcjet)参数测量中的应用。讨论了电子温度、重粒子温度、羽流速度等参数的测量 ,并对一些结果进行了分析与论证 ,指出非热力学平衡态下不同的测量技术测量的是不同的温度指标。从测量技术的发展来看 ,激光测量技术将成为参数测量的主导技术。

In this work some diagnostic techniques are introduced,including emission spectroscopy,laser induced fluorescence,and electrostatic probe.These measurements can be broadly divided into two categories:intrusive and non intrusive.The measurements of electronic temperature,heavy particle,and plume velocity are described and some of the results are analysed.It is emphasized that different diagnostic techniques will produce different results of temperature measurement and the relationships of temperature to techniques are given.It can be seen that laser techniques can investigate the detail of flow properties and will become the main technique for the measurement of Arcjets' properties.