高超声速边界层转捩机理及应用的若干进展回顾

高超声速边界层转捩对飞行器的热传递、表面摩阻和流动分离等有重要影响,尤其是再入飞行器和吸气式巡航飞行器。然而,人们对边界层转捩机理中的很多问题认识还不清楚,或存在争议。本文从扰动波演化的角度回顾了高超声速边界层感受性、线性稳定性和非线性作用的国内若干研究进展,并以基于谐波共振的人工转捩技术为例示范了这些机理认识在转捩控制上的应用。扰动的产生和发展是认识边界层转捩机理的核心。通过研究扰动波来认识边界层转捩机理,开展应用创新研究对提升飞行器性能具有重要意义。

Review of progresses in hypersonic boundary layer transition mechanism and its applications

Hypersonic boundary layer transition plays an important role in the heat transfer, surface friction and flow separation of aircraft, especially in the reentry vehicle and air-breathing cruise aircraft. However, the cognition about boundary layer transition mechanism in present has been in a controversy. In this paper, the domestic research progresses of the hypersonic boundary layer transition are reviewed from the perspective of the evolution of disturbance wave, including receptivity, linear stability and nonlinear effects. In addition, the artificial transition technology based on harmonic resonance is taken for an example to demonstrate the application of transition mechanism with flow control. The generation and development of the disturbance is the core to recognize the boundary layer transition mechanism. So studying the disturbance wave from this aspect to develop the research application of innovation has significant influence to improve the vehicles'' performance.