Three-dimensional shock wave distortion in shock-square vortex loop interaction

被引:6
作者
Ukai, Takahiro [1 ]
Zare-Behtash, Hossein [1 ]
Kontis, Konstantinos [1 ]
Obayashi, Shigeru [2 ]
机构
[1] Univ Glasgow, Sch Engn, Glasgow G12 8QQ, Lanark, Scotland
[2] Tohoku Univ, Inst Fluid Sci, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
关键词
Shock wave interaction; Square vortex loop; Shock wave focusing; NONCIRCULAR JETS; RING; PROPAGATION; SPEED;
D O I
10.1016/j.expthermflusci.2016.06.028
中图分类号
O414.1 [热力学];
学科分类号
摘要
Understanding of the three-dimensional shock wave-vortex loop interaction phenomena plays a key role in noise reduction. This study focuses on the three-dimensional shock wave distortion and propagation phenomena in a near-field supersonic jet. Shock-square vortex loop interaction was experimentally investigated in a square cross-sectional open-end shock wave generating tube at an incident shock Mach number of 1.39 +/- 0.05. A square vortex loop impinged on a reflected shock wave from a wall located in front of the nozzle end. The planar reflected shock wave transforms into either a concave or convex distorted shape due to the opposing high-speed flow emitted from the nozzle corner. The convex shaped shock wave scatters towards the outside of the vortex loop, whereas the concave one converges towards the centre of the vortex loop. The concave shaped shock wave results in shock wave focusing. In shock square vortex loop interaction, the shock wave is locally focused along the axis of the nozzle corner. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码:85 / 90
页数:6
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