基板上に高密度に碁盤目配列された円柱群の圧力損失(熱工学,内燃機関,動力など)

概要

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Pressure distributions of dense arrays of in-line circular cylinders, imitating arrays of condensers on the wall of parallel channel were measured. The diameter and height, d and H, of the cylinder were 16 mm and 20 mm, respectively. The effects of the cross-stream and stream-wise pitches of the cylinders, P_1, P_2, the number of row, N, and the other factors on the pressure loss were clarified. From the flow visualization using oil-film method, the flow pattern is divided into two regimes: one is fence-type for P_1/d≦1.2 and the other is In-line-type for P_1/d>1.2. And the pressure drop is divided into three parts: the inlet, intermediate and outlet ports of the arrays of the cylinders. Depending on the above flow patterns, these pressure drop and pressure recovery are formulated by the dominating factor of the opening ratio, β, of the channel, the pitch, P_2, and numbers of row, N, of the cylinders. The pressure loss given by the recommended equation agrees with the experimental data within ± 10%.
社団法人日本機械学会の論文
2002-03-25