Heat transfer mechanism of a swirling impinging jet in a stagnation region

Atsushi Nozaki, Yasumitsu Igarashi, Koichi Hishida

研究成果: Article査読

29 被引用数 (Scopus)

抄録

Heat transfer characteristics of a swirling impinging jet have been experimentally examined using a combined particle image velocimetry (PIV) and laser-induced fluorescence (LIF) technique for simultaneous measurement of velocity and temperature fields. The present study shows that the radial width of the jet stretches with increasing swirl intensity, and that the stretching phenomenon contributes to the maximum local heat transfer coefficient. At the stagnation region, the flow near the heated surface is mixed intermittently by reverse flows toward upstream, and spatial distributions of temperature are correlated with instantaneous velocity vector maps. The dynamic behavior of recirculation zones, attributed to swirl number Sw and impinging distance, mainly determines the turbulent heat transfer at the stagnation region.

本文言語English
ページ(範囲)663-673
ページ数11
ジャーナルHeat Transfer - Asian Research
32
8
DOI
出版ステータスPublished - 2003 12月
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 流体および伝熱

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