Velocity and concentration distributions in globally unstable axisymmetric helium jets

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• 作者：Sami Boujemaa ; Muriel Amielh ; Marie Pierre Chauve
• 关键词：Fluid mechanics ; Jet ; Instability ; Variable density
  Mots-clé ; s ; Mé ; canique des fluides ; Jet ; Instabilité ; Masse volumique variable
• 刊名：Comptes Rendus Mecanique
• 出版年：2007
• 出版时间：August 2007
• 年：2007
• 卷：335
• 期：8
• 页码：449-454
• 全文大小：221 K

文摘

We study the distribution of the velocities and concentrations in the near-field of axisymmetric pure helium jets, issuing into air at rest. Helium mass concentrations are deduced from O₂ partial pressure measurements and velocity profiles are obtained by laser Doppler velocimetry. The characteristic frequencies of the globally unstable jets are deduced from fast flow visualization and associated image processing. To cite this article: S. Boujemaa et al., C. R. Mecanique 335 (2007).