レイノルズ数120〜30000における円柱はく離領域の熱伝達特性 : 第2報,非定常性および三次元性(熱工学,内燃機関,動力など)

概要

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This paper is the second report of the experimental study concerning the heat transfer in the separated flow behind a circular cylinder for Reynolds numbers from 120 to 30 000. In this report, unsteady and three-dimensional characteristics are described. Instantaneous temperature distribution and its fluctuating pattern on the cylinder surface were measured by an infrared camera. It was found that the pair of streamwise vortices formed in the near wake enhances the heat transfer around the rear stagnation of the cylinder. In particular, the streamwise vortices of 'mode-A', which is formed around Re = 200, effectively enhances the heat transfer around the rear stagnation. For 3 000<Re<15 000, the heat transfer around the rear stagnation increases remarkably with the increase in the Reynolds number. This is caused by the inception of the alternative reattaching flow on the rear face of the cylinder, interlocked by the vortex shedding behind the cylinder.
社団法人日本機械学会の論文
2003-05-25