表面热膜在高超声速边界层中的应用

本文针对标准10°圆锥在不同攻角下边界层的转捩和流动分离现象进行了试验研究.在高超声速情况下,应用表面热膜试验技术测得了10°圆锥在不同攻角下的壁面摩擦应力和动态信号数据.试验研究结果表明表面热膜技术可以成功地应用到高超声速的边界层研究中.所得到的数据有助于正确理解高超声速的边界层的特性.特别是驻点线上,边界层的发展有其特殊的规律.

EXPERIMENTAL STUDY OF HYPERSONIC BOUNDARY LAYERS FLOW WITH SURFACE HOT-FILM

Research was conducted on the experimentally study of the three dimensional boundary layers transition and separation phenomena on a 10 degrees cone model in hypersonic flow.The wind tunnel model,for the purpose of investigation of 3 D boundary layers characteristic,a stainless 10 degrees cone model was especially designed.With surface hot film technique,the boundary layer transition and separation were determined by means of wall shear stress measurements at varies attack angle.The result showed clearly the transition region and separation region on the cone model.A set of dynamic data was yielded and it can be used in the evaluation and improvement of dynamic flow quality of the wind tunnel in which these experiments were performed.