摘要
通过热像仪测量平板翼型在低速风洞中附面层转捩点的变化情况,把红外成像技术应用于航空领域。介绍了附面层的产生及特性、层流附面层和紊流附面层的区别和转捩点的概念;用热像仪采集了平板翼型附面层的热图;根据不同迎角和速度下平板翼型表面的温度分布分析转捩点的变化情况。该文对研究附面层表面的阻力、附面层气流的分离和飞机的气动特性具有一定的参考价值和指导意义。
The infrared imagery is widely used in aviation field,which can measure the change of transition point of boundary layer in low-speed wind tunnel.In this paper,the cause and the characteristics of boundary layer,the difference between laminar flow and turbulent flow,as well as the concept of transition point are introduced first,and then,the thermal image of flat wing section s boundary layer is received by using the thermal imagery instrument.Finally,according to the temperature distributing under different angle and speed, the change of transition point is analyzed. This paper is of reference value and instructive significance to study the drag, separation of boundary layer and aerodynamic characteristics of airplane.
出处
《工程与试验》
2009年第3期51-52,63,共3页
Engineering and Test
关键词
红外成像
附面层
转捩点
infrared imagery
boundary layer
transition point
