Heat Transfer Characteristics of an Impinging Jet in Crossflow

  • Wang L
  • Sundén B
  • Borg A
 et al. 
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Abstract

The heat transfer characteristics of an impinging jet into a crossflow have been investi- gated by the liquid crystal thermography technique. The jet nozzle is circular and is inclined at 10 deg with respect to the target wall. In a turbulent flow regime, the effects of the jet Reynolds number, the velocity ratio, and the crossflow Reynolds number on the heat transfer are examined. The results show that the heat transfer patterns are strongly affected by the jet Reynolds number and the velocity ratio. For a given jet Reynolds num- ber, it is found that the crossflow diminishes the peak Nusselt number in the jet impinge- ment region. However, in the wall jet region, the results suggest that the local heat transfer is nearly independent of the crossflow Reynolds number

Author-supplied keywords

  • crossflow
  • heat transfer
  • jet impingement
  • liquid crystal thermography

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Authors

  • Lei Wang

  • Bengt Sundén

  • Andreas Borg

  • Hans Abrahamsson

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