細管における垂直上昇気液二相流の伝熱・流動特性(沸騰,熱工学部門一般講演)

概要

論文の詳細を見る
Void fraction, frictional pressure loss and heat transfer coefficient were measured for vertical upward heated air-water two-phase flow in a 1.03mm I.D. stainless steel tube to investigate heat transfer and flow characteristics of two-phase flow in minichannel. Flow regimes were observed using high speed video camera. Void fraction was correlated with drift flux model better than Smith's correlation when α>0.7, but did not agree with both correlations when α<0.7. Frictional pressure losses agreed with Chisolm-Laird's equation at relatively large liquid Reynolds number. At low liquid Reynolds number, experimental results were close to Mishima-Hibiki's modified Chisolm-Laird's equation. Pressure loss was affected by flow regime at low liquid Reynolds number. Heat transfer coefficient fairly agreed with the results of ordinary inner diameter tube except for low liquid velocities.
社団法人日本機械学会の論文
2004-09-04