摘要
为了探究连续双扫掠激波/湍流边界层干扰的流动特性,采用仿真方法对一双尖鳍/平板物理模型进行研究。结果表明:双扫掠激波/湍流边界层干扰形成的两个干扰区存在明显的相干现象,虽然第一道扫掠激波/边界层干扰流动仍具有典型的准锥形相似特性,但受其干扰所形成的非均匀流的影响,第二道扫掠激波/边界层干扰却不再具有准锥形相似特性,同时第二个干扰区将影响其上游临近气流的运动甚至影响第一个干扰区的再附线和分离线等结构。两个干扰区形成各自的λ波结构,并且沿着流向两个干扰区内的激波结构相互汇聚,最终合并为单个更强的λ波结构;不仅如此,两个干扰区内还形成了复杂的旋涡结构,包括一级主旋涡和二级主旋涡,这些旋涡向下游运动,最终融合成一个尺度更大的锥形主旋涡。
In order to explore the flow characteristics of successive bi-swept shock waves/turbulent boundary layer interaction,numerical simulation is applied to study a double-fins/plate physical model.The results show that the two interaction regions of the bi-swept shocks/boundary layer interaction flow interfere with each other.Though the interaction region formed by the first swept shock maintains its quasi-conical similarity nature,due to the non-uniform flow downstream of the first shock,the quasi-conical similarity nature is no longer applicable to the second swept shock/boundary layer interaction.In addition,the second interaction region will affect the adjacent upstream flow and it even alters the behavior of the reattachment line and separation line induced by the first shock.Twoλ-shaped shocks emerge in the two interaction regions,and these shocks converge along streamwise direction,and eventually merge into a stronger singleλ-shaped shock.Furthermore,complex vortical structures are generated in the two interaction regions,including the first main vortex,the second main vortex.The two vortices move downstream and coalesce to a larger conical main vortex.
作者
盛发家
谭慧俊
黄河峡
刘亚洲
高婉宁
王卫星
SHENG Fa-jia;TAN Hui-jun;HUANG He-xia;LIU Ya-zhou;GAO Wan-ning;WANG Wei-xing(Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjng 210016,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2019年第5期1023-1031,共9页
Journal of Propulsion Technology
基金
国家自然科学基金重点项目(11532007)
国家自然科学基金(11502111)
关键词
激波
湍流
边界层干扰
流动特性
主旋涡
Shock waves
Turbulent
Boundary layer interaction
Flow characteristics
Main vortex
