Pool Boiling on Wire in Microgravity-What Have We Learned
In the past years, steady pool boiling of degassed R113 on thin platinum wires has been studied systematically in our lab, including experiments in long-term microgravity aboard RS-22, in short-term microgravity in the Drop Tower Beijing/NMLC, and in normal gravity on the ground. Slight enhancement of nucleate boiling heat transfer is observed in microgravity, while dramatic changes of bubble behaviors are much evident The value of CHF in microgravity is lower than that in normal gravity, but it can be predicted well by the Lienhard-Dhir correlation, although the dimensionless radius in the present case is far beyond its initial application range. The scaling of CHF with gravity is thus much different from the traditional viewpoint. Considering the influence of the Marangoni effects, the different characteristics of bubble behaviors in microgravity have been explained. A new bubble departure model has also been proposed, which can predict the whole observation both in microgravity and in normal gravity.
Pool Boiling Bubble Detachment Scaling of CHF Microgravity
Jian-Fu ZHAO Shi-Xin WAN Shuang-Feng WANG
National Microgravity Laboratory/CAS,Institute of Mechanics, Chinese Academy of Sciences, China National Microgravity Laboratory/CAS, Institute of Mechanics, Chinese Academy of Sciences, China
国际会议
西安
英文
269-274
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）