Normal Shock Vortex Interaction
Normal Shock Vortex Interaction
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正向冲击涡相互作用
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
E. Krause
中科院分区：
文献类型：
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作者：
O. Thomer;W. Schroeder;E. Krause
摘要：通过欧拉和纳维-斯托克斯方程的数值求解，研究了自由流马赫数为 1.6 和不同涡流强度下随时间变化的三维超音速流的法向激波引起的细长纵向涡流的破坏。当发生击穿时，激波下游会形成自由驻点，随后是具有气泡状流动结构的逆流区域。涡流破裂部分沿轴向和径向增长，直至气泡达到稳定位置。激波在涡旋轴附近保持正常，但在远离涡旋轴的地方会弯曲。激波下游的流动略有振荡。数值结果清楚地揭示了轴向和径向上随时间变化的流动结构。结果与最近的实验结果相比较。 （9 个数字，12 个参考文献。）
Abstract : Breakdown of a slender longitudinal vortex caused by a normal shock is studied with a numerical solution of the Euler and the Navier-Stokes equations for time-dependent, three-dimensional, supersonic flow at a free stream Mach number of 1.6 and different vortex strengths. When a breakdown occurs, a free stagnation point is formed downstream from the shock, followed by a region of reversed flow with a bubble-like flow structure. The burst part of the vortex grows in the axial and radial directions until the bubble reaches a stable position. The shock remains normal near the axis of the vortex but is curved further away from it. The flow downstream from the shock is slightly oscillating. The numerical results clearly reveal the time-dependent flow structure in the axial and the radial direction. The results compare well with recent experimental findings. (9 figures, 12 refs.)