空气动力学学报2025，Vol.43Issue(2)：86-95,10.DOI:10.7638/kqdlxxb-2024.0087
有攻角圆锥边界层横流失稳分析
Crossflow instability analysis of boundary layer on a yawed cone
摘要
Abstract
The crossflow instability is one of the main transition mechanisms in complex three-dimensional boundary layers,though it is still far from being fully understood.In the present study,the two-dimensional global stability analysis(BiGlobal)and plane-marching three-dimensional parabolized stability equations(PSE3D)were employed for the crossflow instability in the boundary layer of a sharp cone at 6°angle of attack under the Mach 6 wind tunnel experimental conditions.The results were compared with those of the one-dimensional linear stability theory(LST)and direct numerical simulation(DNS).It is shown that the crossflow mode is mainly distributed on the leeward side,yet can still remarkably affect the windward side as its amplitude increases downstream.The most unstable travelling crossflow mode is more amplified and has a smaller wave angle than the stationary crossflow mode.PSE3D obtains a slightly lower N factor than that obtained by BiGlobal,while the two have similar peak frequencies,indicating that the non-parallel effect weakens the growth of crossflow disturbance,without changing the peak frequency of disturbance.The N factor obtained by LST is significantly larger than those from global stability analyses,reflecting the difference in the definition of the growth rate between those two methods as well as the influence of three-dimensional effects.Therefore,different stability analysis methods have a significant impact on determining the transition Nfactor.关键词
边界层转捩/横流失稳/稳定性分析/有攻角圆锥Key words
boundary layer transition/crossflow instability/stability analysis/yawed cone分类
力学引用本文复制引用
刘姝怡,陈曦,万兵兵,陈坚强,黄刚雷..有攻角圆锥边界层横流失稳分析[J].空气动力学学报,2025,43(2):86-95,10.基金项目
国家自然科学基金(12372225,12202477) （12372225,12202477）
