B-323 レイノルズ数 100∿30000 における円柱はく離領域の熱伝達の時空間特性

概要

論文の詳細を見る
Unsteady and three-dimensional characteristics of heat transfer from a circular cylinder to the cross-flow of air was investigated experimentally for Reynolds numbers from 100 to 30000. An infrared camera was used to measure time and space-resolved heat transfer on the cylinder surface, heated under the condition of constant heat flux. Fluctuating heat transfer was measured by a heat flux sensor. For Re>180,the heat transfer at the rear of the cylinder has a spanwise nonuniformity, the wavelength of which agrees well with that of streamwise vortices formed in the near-wake. For Reynolds numbers greater than several thousand, the heat transfer at the rear face is remarkably increased by an altemating reattaching flow, which is caused by the rolling-up of the separated shear layers.
日本流体力学会の論文
2003-07-28