流动显示技术及其在流体力学研究中的应用

FLOW VISUALIZATION TECHNIQUE AND ITS APPLICATION IN THE STUDY OF FLUID MECHANICS

本文概要地介绍流体力学研究中常用的流(?)显示技术及其发展状况。对流动(5)显示在研究表面流态和空间流(?)特征方面的作用,做了简要说明。在强调常规流(?)显示技术解决飞行器设计中气(?)问题重要性的同时,介绍了几种发展中的流(?)显示方法,及其与现代光学、计算机图象处理技术相结合,在流体力学实验中的广阔应用前景。对当前普遍有兴趣的剪切层结构、分离流与旋涡、激波边界层相互干扰、非定常流,以及大攻角情况下复杂流场特性等流(?)显示问题,也做了一些探讨。

This paper discusses briefly the flow visualization techniques for practical fluid mechanics testing and its development in current state. It is known that the flow visualization has played an important role in the study of surface patterns and spatial flow structures, so it becomes the object of intensive research. Conventional flow visualization techniques of great importance to aerodynamic design of vehicles are emphasized and its new developments based on the modern optics ane computer/image processing are introduced. In addition, a survey of the flow visualization techniques for studying the complicated flow phenomena, such as the structure of shear layer, separated flow, vortices, interaction of shock wave-boundary layer, unsteady flow and the flow field at high angle of attack, is also given in this paper.