TY - JOUR
T1 - Heat Transfer to Freon near the Critical Pressure Flowing in Tubes (3rd Report, Post-Dryout Heat Transfer)
AU - Yoshida, Suguru
AU - Nishikawa, Kaneyasu
AU - Takamatsu, Hiroshi
AU - Mori, Hideo
PY - 1985
Y1 - 1985
N2 - Studies of the post-dryout heat transfer were made based on the experimental data of the heat transfer to Freon 22 flowing upward in vertical, uniformly heated round tubes (9 and 13 mm ID) for a range of reduced pressure of 0.68 to 0.92, mass velocity of 400 to 1 600 kg/(m2·s) and heat flux of 12 to 70kW/m2. The wall temperatures estimated by the use of a conventional, theoretical model agreed qualitatively with those measured, but not quantitatively. A nondimensional parameter Kn was introduced to a model for the post-dryout regime to take account of the thermodynamic nonequilibrium between the vapor and the liquid droplets. A correlation of Kn was obtained, and this correlation, used with the correlation for the heat transfer to the superheated vapor, was successful in predicting the wall temperature.
AB - Studies of the post-dryout heat transfer were made based on the experimental data of the heat transfer to Freon 22 flowing upward in vertical, uniformly heated round tubes (9 and 13 mm ID) for a range of reduced pressure of 0.68 to 0.92, mass velocity of 400 to 1 600 kg/(m2·s) and heat flux of 12 to 70kW/m2. The wall temperatures estimated by the use of a conventional, theoretical model agreed qualitatively with those measured, but not quantitatively. A nondimensional parameter Kn was introduced to a model for the post-dryout regime to take account of the thermodynamic nonequilibrium between the vapor and the liquid droplets. A correlation of Kn was obtained, and this correlation, used with the correlation for the heat transfer to the superheated vapor, was successful in predicting the wall temperature.
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U2 - 10.1299/kikaib.51.693
DO - 10.1299/kikaib.51.693
M3 - Article
AN - SCOPUS:0022014841
VL - 51
SP - 693
EP - 698
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 462
ER -