Space-time analysis of a self-excited axisymmetric helium jet

被引：0
|
作者：
Boujemaa, S. [1 ]
Amielh, Muriel [2 ]
Chauve, M.P. [2 ]
机构：
[1] Faculté des Sciences de Tunis, Département de Physique, Campus Universitaire Le Belvédère, 1060 Tunis, Tunisia
[2] Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), UMR CNRS 6594, Technopˆle Cĥteau Gombert, 49 rue F. Joliot-Curie, 13384 Marseille Cedex 13, France
来源：
Journal of Flow Visualization and Image Processing | 2006年 / 13卷 / 02期
关键词：
Buoyancy - Flow visualization - Helium - Plasma density;
D O I：
10.1615/JFlowVisImageProc.v13.i2.40
中图分类号：
学科分类号：
摘要：
An axisymmetric jet of pure helium issuing into ambient air is experimentally investigated. Fast flow visualizations associated with laser Doppler velocimetry measurements are used to study the effects of strong density variations on the dynamics of the instabilities, which develop in the near-field of the jet. Thanks to several typical space-time diagrams, made by image processing techniques, the characteristic global mode of the jet instability is highlighted and the effects of pairing processes and buoyancy on this instability mode are analyzed. Copyright @2006 Begell House, Inc.
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页码：153 / 173
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