Shock wave-induced vortex loops emanating from nozzles with singular corners
Shock wave-induced vortex loops emanating from nozzles with singular corners
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DOI：
10.1007/s00348-010-0839-7
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发表时间：
2010-03
影响因子：
2.4
通讯作者：
H. Zare-Behtash;K. Kontis;N. Gongora-Orozco;Kazuyoshi Takayama
中科院分区：
文献类型：
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作者：
H. Zare-Behtash;K. Kontis;N. Gongora-Orozco;Kazuyoshi Takayama
本研究的重点是实验研究具有奇异角的喷管所产生的衍射激波模式及其旋涡环的形成、传播和衰减。采用非侵入式定性和定量技术：纹影、阴影成像和粒子图像测速（PIV）来分析诱导流场。使用眼形喷嘴，角接头代表奇异点。两种情况下，小轴面积长度= 6和15mm，长轴面积= 30mm。实验在0.8 × 105和4.6 × 105范围内进行。空气用于激波管的驱动和驱动部分。
The focus of the current study is to examine experimentally the diffracted shock wave pattern and the consequent vortex loop formation, propagation, and decay from nozzles having singular corners. Non-intrusive qualitative and quantitative techniques: schlieren, shadowgraphy, and particle image velocimetry (PIV) are employed to analyze the induced flow-fields. Eye-shaped nozzles were used with the corner joints representing singularities. The length of the minor axes area= 6 and 15 mm, with the major axisb= 30 mm for both cases. The experiments are performed for flow Reynolds numbers in the range 0.8 × 105and 4.6 × 105. Air is used in both driver and driven sections of the shock tube.