利用Mixture多相流模型对R32在2 mm水平微细光管内流动沸腾进行了三维稳态数值模拟.模拟的工况范围为:质量流速200～400 kg/(m2s),热流密度10～40 kW/m2,饱和温度15～20℃.结果表明:质量流速的增加消弱了重力对两相分布的影响;热流密度的增加强化了壁面附近的核态沸腾.数值模拟的换热系数和压降与实验结果的平均偏差分别为11.3％和-1.1％.
A three-dimensional steady simulation,using the Mixture multiphase flow model,was conducted to investigate the flow boiling of R32 in a 2 mm smooth mini-tube.The numerical simulation conditions were 200～400 kg/(m2s) mass flux,10～40 kW/m2 heat flow and 15～20℃ saturation temperature.The results showed that the effect of gravity on two phase distribution weakens with increasing mass flux,and the nucleate boiling near the wall strengthens with increasing heat flux.The average deviations of heat transfer coefficient and pressure drop between numerical and experimental results are 11.3％ and-1.1％,respectively.
参考文献
| [1] | Peter A. Kew;Keith Cornwell .Correlations for the prediction of boiling heat transfer in small-diameter channels[J].Applied thermal engineering: Design, processes, equipment, economics,1997(8-10):705-715. |
| [2] | Z. Yang;X. F. Peng;P. Ye .Numerical and experimental investigation of two phase flow during boiling in a coiled tube[J].International Journal of Heat and Mass Transfer,2008(5/6):1003-1016. |
| [3] | E. Da Riva;D. Del Col .Numerical Simulation of Laminar Liquid Film Condensation in a Horizontal Circular Minichannel[J].Journal of heat transfer: Transactions of the ASME,2012(5):051019-1-051019-8. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%