立方体突起まわりの局所熱伝達 : 傾き角45°の場合

概要

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An experimental study was performed to investigate the local heat transfer around a cube mounted on the wall. The cube lied in the turbulent boundary layer. The flow angle of attack to the cube was 45 degree. The Reynolds number ranged from 4.2×10^3 to 3.3×10^4. The surface temperature distributions around the cube were measured with thermocouples under the condition of a constant heat flux. The local heat transfer is very high near the front corner on the top face of the cube. This high heat transfer region extends from the front corner to downstream along both edges. This is caused by the formation of lamb horn vortex. The local heat transfer is also high in the region of horseshoe vortex formed around the cube. On the wall behind the cube, there is a pair of minimum heat transfer region. The average Nusselt number on each face of the cube is given as a function of Reynolds number. The overall Nusselt number of the cube is expressed by Nu_m=0.43Re^<0.58>.
社団法人日本機械学会の論文
1999-11-25