球状粒子充てん傾斜空気層内の自然対流熱伝達

概要

論文の詳細を見る
Experiments of natural convection heat transfer in an inclined air layer with spherical particles under isothermal heating and cooling conditions were carried out for the ranges of inclination angles (θ=0~180°), aspect-ratios (H/W=2.5~7.9), modified Prandtl numbers (P*_r=1.1~45), ratios of diameter of spherical particles to width of the porous layer (d/W=0.04~0.516) and modified Rayleigh numbers (R*_a=2.2×10~1.03×10^3). According to the inclination angle, the convection heat transfer in the porous layer varied because of the change of the convection flow type. In addition, useful correlations of non-dimensional convection heat transfer were derived in the relations Nusselt number N_u=f[P*_r, d/W, R*_a cos(θ-60°)] for θ=0~15°, and N_u=f[P*_r, H/W, R*_a (θ-60°)] for θ=0~120°.
社団法人日本機械学会の論文
1985-11-25