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Investigation of density ratio effects on normally injected cold jets into a hot cross flow

Ramezanizadeh, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1007/s00419-007-0132-2
  3. Publisher: 2007
  4. Abstract:
  5. In this work, hydrodynamic effects of multiple squared cross-section cold jets inclined normally into a hot cross flow were computationally simulated using large eddy simulation (LES) approach. The finite volume method and the SIMPLE algorithm on a multi-block non-uniform staggered grid were applied. The jet into cross flow velocity ratio and the jet Reynolds number were 0.5 and 4,700, respectively. Simulations were performed for three different jets into cross flow temperature ratios, namely, 2, 1, and 0.5, corresponding to density ratios of 0.5, 1, and 2. The experimental and numerical results of Ajersch et al. (J. Turbomachinery 119(2), 330-342, 1997) at unit density ratio were used for validation purposes. The density ratio effects on the flow characteristics were investigated. It was shown that the density ratio has significant effects on the hydrodynamics of the jet into cross flow problems and even though the flow Mach number may be low, its effects due to temperature differences between the jet and the cross flow cannot be easily ignored. © 2007 Springer-Verlag
  6. Keywords:
  7. Computational methods ; Hydrodynamics ; Large eddy simulation ; Mach number ; Numerical methods ; Reynolds number ; Counter rotating vortex pairs ; Density ratio effects ; Horse shoe vortices ; Jet into cross flow ; Jets
  8. Source: Archive of Applied Mechanics ; Volume 77, Issue 11 , 2007 , Pages 835-847 ; 09391533 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s00419-007-0132-2