凝固を伴う直円管流の熱伝達実験 : 冷却強さがT^*_w≦10の場合

概要

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Experimental results on heat transfer of straight pipe flow with internal freezing of water are presented. This study covers the range of Re_D=200-10000, T^*_w=3-10 and L/D=20-80. The Pr number is fixed to 11.2. Referring to the steady pressure drop data and observation of internal ice layers, data of mean Nusselt number at steady state are categorized into four regions: L-region (low Re_D and smooth ice surface), S-region (low Re_D and ice layer with a step), T-region (high Re_D and very thin ice layer) and I-region (intermediate region between L-and T-region or intermediate region between S-and T-region). Experimental formulae of Nu_m for each region are presented. Transient behaviors of Nu_m, pressure drop and the location of the step on the ice surface are also shown.
一般社団法人日本機械学会の論文
1992-01-25