高速流场测量新技术评述

介绍了国外近年来正在积极探索的几种高速流场测量新技术。它们的共同特点是非接触的和定量的，测量是空间和时间可分辨的。这些技术直接对分子速度进行测量，避免了由于粒子投放引起的滞后和紧靠壁面的附面层中的粒子的投放困难。其中有些测量技术是多点测量的，高速流动测量期望测量有这一性能。有些测量能用来对几个参数同时进行测量，例如激光感应荧光技术和喇量测量技术，流动的重要参数速度，压强，温度和密度可用这些技术进行

New Techniques on Measurement of High-Speed Flow Field

Several new techniques on measurement of high speed flow actively developed abroad in recent years are introduced. The common features of them are nonintrusive and quantitative. The measurement is of spatial and temporal resolution. These techniques can directly measure the velocities of molecules; avoiding the problems associated with particles, particle lag and imposing seeding difficulties on boundary layers close to the walls.Some of these techniques are of multiple-point measurements, desirable for measurements in high speed flows. Some of these techniques are capable of measuring several parameters simultaneously, for example, the technique of laser-induced fluorescence and the Raman measuring technique. The important parameters of flow velocity, pressure, temperature and density are measured by these techniques. Therefore the development of these techniques are of broad interest in aeronautics. To our knowledge two of these techniques are available for research and development in our country. There are holographic computer tomography and technique of laser-induced fluorescence. We have dealt with the research technique of laser-induced fluorescence for several years, and achieved a certain valuable results. Researches of aeronautics need the development of new valuable techniques of measurements,resulting in the development of these new techniques to meet the requirements.