The recent investigations on the rewettmg and film boiling of liquid flowing along a hot/heated surface are briefly reviewed and discussed.Some advanced theoretical analyses are conducted and new conclusions achieved....The recent investigations on the rewettmg and film boiling of liquid flowing along a hot/heated surface are briefly reviewed and discussed.Some advanced theoretical analyses are conducted and new conclusions achieved.These investigations describe the fundamental characteristics of liquid flow boiling and further the complicated rewetting phenomena,and have resulted in considerable insight intothe mechanism.展开更多
Experiments have been carried out for steady turbulent-flow film boiling of subcooledliquid R11 flowing upward in a vertical circular tube with velocities in a range of 1 .3-4.9m/s and liquid temperatures subcooling i...Experiments have been carried out for steady turbulent-flow film boiling of subcooledliquid R11 flowing upward in a vertical circular tube with velocities in a range of 1 .3-4.9m/s and liquid temperatures subcooling in a range of 16.2-32 .5℃. The exponent ofRe_D in a semi-empirical expression is determined as m = 0.65 from the experimental dataobtained, which coincides with the theoretical value m = 2/3 reported previously. Mean-while, the modified semi-empirical theory is verified and further discussed, and the onlyempirical constant c is determined as 5.4 ×10~5.展开更多
基金Project supported by the National Natural Science Foundation of Chinaalso by NSFNASA of U.S.
文摘The recent investigations on the rewettmg and film boiling of liquid flowing along a hot/heated surface are briefly reviewed and discussed.Some advanced theoretical analyses are conducted and new conclusions achieved.These investigations describe the fundamental characteristics of liquid flow boiling and further the complicated rewetting phenomena,and have resulted in considerable insight intothe mechanism.
文摘Experiments have been carried out for steady turbulent-flow film boiling of subcooledliquid R11 flowing upward in a vertical circular tube with velocities in a range of 1 .3-4.9m/s and liquid temperatures subcooling in a range of 16.2-32 .5℃. The exponent ofRe_D in a semi-empirical expression is determined as m = 0.65 from the experimental dataobtained, which coincides with the theoretical value m = 2/3 reported previously. Mean-while, the modified semi-empirical theory is verified and further discussed, and the onlyempirical constant c is determined as 5.4 ×10~5.
