摘要
斜波转捩是一类由一对频率、波角相同但方向相反的斜波引起的转捩过程,广泛存在于平板、零攻角圆锥、二维曲板等边界层流动以及压缩拐角流动、自由剪切流动中。斜波转捩不仅是超声速乃至高超声速流动中主要的自然转捩路径之一,还代表一种重要的亚临界转捩或旁路转捩路径,在管流、槽道流乃至高超声速大钝度熵层/边界层流动转捩中扮演着重要角色。开展斜波转捩研究对深化转捩机制认识,改善转捩预测水平,提升转捩控制能力,进而优化飞行器设计具有重要意义。为此,回顾了斜波转捩研究30余年来的发展历程和重要进展,介绍了斜波转捩发生机制、与其他转捩路径的关系以及相关控制手段,并展望了有待进一步研究的问题。
Oblique transition is a transition scenario initiated by a pair of oblique waves with equal but opposite angles.It widely exists in boundary layer flow(over flat plate,cone at zero angle of attack,two-dimensional curved plate etc.),compression corner flow and free shear flow.Oblique transition/breakdown is not only one of the main natural transition paths in supersonic or hypersonic flows but also represents an important subcritical transition or bypass transition,which plays an important role in the transition of tube flow,channel flow and hypersonic large-blunt boundary(entropy)layer flows.Therefore,it is of great significance to carry out the study of oblique transition for comprehending the transition mechanisms,improving the transition prediction level,elevating the ability of the transition control,and ultimately optimizing the design of aircrafts.In this paper,important progress of studies on oblique transition in the past thirty years was reviewed,briefly introducing the physical mechanisms of oblique transition,its relationship with other transition scenarios and related control methods.Finally,some issues needed to be further studied were discussed.
作者
邓泽峰
陈曦
张传鸿
DENG Ze-feng;CHEN Xi;ZHANG Chuan-hong(College of Aeronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;State Key Laboratory of Aerodynamics,Mianyang 621000,China)
出处
《气体物理》
2023年第3期1-18,共18页
Physics of Gases
基金
国家自然科学基金(12002354,12172173)
航空科学基金(2020Z012052003)。
关键词
斜波转捩
流动稳定性
转捩控制
转捩逆转
破碎机制
oblique transition
hydrodynamic stability
transition control
transition reversal
breakdown mechanisms
