二次元衝突噴流中に円柱を設置した場合の流れ場および熱伝達特性 : 円柱挿入位置および円柱径の影響(熱工学,内燃機関,動力など)

概要

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Experiments of jet impingement heat transfer were performed for the case that a circular cylinder was inserted into a two-dimensional slot jet. The diameter of the cylinder and its insertion location were changed to investigate their effects on the heat transfer rates on the target surface. The distance between the slot and the surface was kept constant to be 3 or 5 times of the slot width, h=l5 mm. The Reynolds number based on the slot width was fixed at 9 500 for the heat transfer experiments, and 4 800 for flow visualization. Two kinds of flow pattern behind the cylinder were observed, which corresponds well to pressure distributions in the near-field of the geometrically-obtained stagnation point and also the Nusselt number distributions. The peak Nusselt number in the case of the insertion location relatively close to the slot was found to be at most two times higher than that in the case without the cylinder insertion.
一般社団法人日本機械学会の論文
2003-07-25