十字形管路内の流れおよび熱伝達 : 第1報,層流場の数値解析

概要

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A numerical calculation method based on the pressure correction procedure is proposed for the prediction of fully developed flows in non-circular ducts. Calculations were carried out on ducts of a cross-shaped cross-section, which may well be regarded as possible candidates for compact heat exchangers. A parametric study was made on the friction and heat transfer characteristics in terms of the parameter α associated with the decrease in the cross-sectional area (namely, α=0 for a square duct and α→1 for parallel plates.) As increasing α, both the Nusselt number and friction coefficient decrease toward their minimum levels, but then increase gradually, and overshoot those of a square duct. Consequently, the heat transfer coefficient obtained under a constant pumping power shows a drastic increase for α>0.4, suggesting an excellent performance of heat transfer surfaces.
一般社団法人日本機械学会の論文
1986-05-25