高超声速边界层的转捩及预测

首先描述了边界层转捩的基本过程及研究内容。在此基础上,指出了高超声速边界层不同于不可压缩边界层的流动不稳定性特性,并介绍了边界层的转捩机理与感受性特征;给出了高超声速三维边界层中预测转捩的常用方法,并着重介绍了多用于工程实际的e N方法以及对e N方法的理性改进,同时列举了在高超声速三维边界层中应用e N方法实现转捩预测的多个实例。最后,分析并总结了高超声速边界层转捩预测所存在的困难及需要解决的问题。

Transition and prediction for hypersonic boundary layers

It is summarized that the basic process and problems of the transition of boundary layers. Based on which, the fundamentally distinguishes in instability of hypersonic boundary layers from incompressible boundary layers are shown, and the transition mechanism, receptivity characteristic, transition prediction methods for three-dimensional hypersonic boundary layers are introduced, in which the e^N method using in engineering and it''s rational improvement is specially shown. Some application examples of prediction transition for three-dimensional hypersonic boundary layers using e^N method are given. Finally, the difficulty and problems need to be solved in the hypersonic boundary layers are introduced.