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The effect of a swirled annular jet on convective heat transfer in confined coaxial jet mixing.

Author(s) : MEMAR H., HOLMAN J. P., DELLENBACK P. A.

Type of article: Article

Summary

Convective heat transfer data from a confining tube to coaxial, counter-swirled jets are presented. The inner jet diameter was approximately twice the annular gap dimension. The inner jet swirl number varied from zero to 1.2 for a Reynolds number of 60,000. The ratio of annular-to-inner jet Reynolds numbers varied from 0.10 to 0.95. Plots of local Nusselt numbers exhibit minima and maxima corresponding to the separation and reattachment locations associated with wall-bounded recirculation regions. As inner jet swirl strength was increased, the peak Nusselt number was shifted upstream. As the annular flow rate was increased, the near wall recirculation zones were stretched and shifted downstream until at sufficiently high annular flow rates, the zones were no longer in evidence from the heat transfer data.

Details

  • Original title: The effect of a swirled annular jet on convective heat transfer in confined coaxial jet mixing.
  • Record ID : 1994-1499
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 36 - n. 16
  • Publication date: 1993/11

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