正方形柱の抗力軽減と伝熱促進

概要

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To control the flow around a square prism, a rod was set in upstream of the prism. The side length of the prism was 20 mm and the diameter of the rod changed from 2 to 10 mm. The spacing between the axes of the prism and the rod was 40 to 100 mm, and the Reynolds number ranged from 5.3×10^4. The relationship between the local heat transfer and the fluid flow around the square prism was investigated. Three flow patterns are occurred. The best flow pattern for enhancement of heat transferand reduction of drag is the pattern without vortex shedding from the rod. The flow pattern changes depending on the rod diameter, its position and Reynolds number. The average heat transfer increase by 35% compared with that of without rod. Further, the reduction of the drag coefficient becomes to about 80%.
社団法人日本機械学会の論文
2000-06-25