将液滴在常压下突然置于低压环境中,液滴由最初的平衡状态变成过热状态,发生闪蒸.本文实验研究了低压闪蒸液滴内部形态和温度的变化,系统描述了液滴闪蒸过程中的各种形态变化,总结了稳态闪蒸和稳态结冰过程中环境压力和初始温度对温度变化的影响.实验结果表明液滴闪蒸分六种形态.稳态闪蒸中环境压力越低,液滴的最终温度也越低;液滴的初始温度越高,降到最低温度的时间越长.稳态结冰过程中,液滴初始温度增加,液滴结冰温度和结冰回升最高温度也随之增加;液滴的结冰温度和回升最高温度随环境压力的增高而减小.
参考文献
[1] | Owen I;Jali J M .Heterogeneous Flashing in Water Drops[J].International Journal of Multiphase Flow,1991,17(05):653-660. |
[2] | Shepherd J E;Sturtevant B .Rapid Evaporation at the Superheat Limit[J].Journal of Fluid Mechanics,1982,121:379-402. |
[3] | Avedisian C T .Effect of Pressure on Bubble Growth Within Liquid Droplets at the Superheat Limit[J].ASME Journal of Heat Transfer,1982,104:750-757. |
[4] | Frost D L .Dynamic of Explosive Boiling of a Droplet[J].ASME/JSME Thermal Engineering,1987,2:447-454. |
[5] | H. T. Shin;Y. P. Lee;J. Jurng .Spherical-shaped ice particle production by spraying water in a vacuum chamber[J].Applied thermal engineering: Design, processes, equipment, economics,2000(5):439-454. |
[6] | Isao Satoh;Kazuyoshi Fushinobu;Yu Hashimoto .Freezing of a water droplet due to evaporation-heat transfer dominating the evaporation-freezing phenomena and the effect of boiling on freezing characteristics[J].International Journal of Refrigeration,2002(2):226-234. |
[7] | H. T. Shin;Y. P. Lee;J. Jurng .Spherical-shaped ice particle production by spraying water in a vacuum chamber[J].Applied thermal engineering: Design, processes, equipment, economics,2000(5):439-454. |
[8] | Feuillebois F.;Creismeas P.;Pigeonneau F.;Szaniawski A.;Lasek A. .FREEZING OF A SUBCOOLED LIQUID DROPLET[J].Journal of Colloid and Interface Science,1995(1):90-102. |
[9] | 张绍志,王剑锋,陈光明.水制冷系统闪蒸器特性的理论分析[J].低温工程,2000(03):12. |
[10] | Strub M;Jabbour O;Strub F et al.Experimental Study and Modeling of the Crystallation of a Water Droplet[J].International Journal of Refrigeration-Revue Internationale du Froid,2003,26:59-68. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%