櫛形フィンの伝熱性能予測法の開発

概要

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Numerical calculation was carried out on flow and temperature fields around a heatsink with plate fins subjected to a uniform flow, varying the ratio of fin length L to the half-pitch of fins s. The average flow velocity between fins U_f became lower, as Re_0 s/L decreased, where Re_0 was Reynolds number defined by uniform flow velocity and s. It was also found that friction resistance and heat transfer of the fins showed excellent agreement with those of parallel plates with uniform inlet flow velocity equal to U_f. A prediction technique for the cooling performance of the heatsink was developed in which U_f was estimated under the condition of constant pressure distribution at its downwind edge. The present technique can predict the heat transfer of the fins with error level below 30% under practical conditions of electronics design, while it underestimates U_f in the region of small Re_0 s/L.
一般社団法人日本機械学会の論文
1995-10-25