断面長方形の開放形態セイホン内の熱伝達 : 対向する二平面が等温と断熱の場合

概要

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The effects of the width of a rectangular thermosyphon passage on the natural convection heat transfer in an open thermosyphon with uniform temperature and adiabatic surfaces were investigated numerically and experimentally. The numerical analyses were excuted by the finite difference method for the Prandtl number Pr = 5 in the range of the Grashof number G_<rH>=10^3〜10^5 and the aspect ratio of the passage W/H (width/length) = 0.05〜1.0. The experiments were carried out for pure water in the range of G_<rH> = 3.7x10^7〜1.2x10^<10> and W/H = 0.025〜0.20. It was found that the overall Nusselt number <Nuw>^^^- for both of the numerical and experimental results were correlated with the Rayleigh number Raw by the following empirical equation. <Nuw>^^^- = 0.0021 Raw・(W/H)・{1-exp[ -300 (Raw(W/H))^<-3/4> ]} [2x10^2 <Raw (W/H) < 1X10^6]
一般社団法人日本機械学会の論文
1988-08-25