微米级液滴在负压环境下的闪蒸过程研究
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摘要
针对微米级粒径液滴在负压环境下的蒸发过程,建立了单液滴闪蒸模型。针对不同液滴粒径、初始温度、闪蒸压力条件对应的蒸发速率和液滴粒径的变化,采用FLUENT 14.0进行建模计算,并通过实验验证模型的有效性。通过计算得到单液滴的闪蒸规律并分析其作用原理,得出具有代表性的结论。
Aiming at the evaporation process of micron sized droplet in negative pressure environment,a single drop flash model was established. According to the change of droplet size,initial temperature and flash pressure,the FLUENT 14. 0 was used to calculate the model. The validity of the model was verified by experiments. The flash rule of single droplet is obtained by calculation,which function principle is analyzed,and a representative conclusion is obtained.
Aiming at the evaporation process of micron sized droplet in negative pressure environment,a single drop flash model was established. According to the change of droplet size,initial temperature and flash pressure,the FLUENT 14. 0 was used to calculate the model. The validity of the model was verified by experiments. The flash rule of single droplet is obtained by calculation,which function principle is analyzed,and a representative conclusion is obtained.
引文
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[2]Shin H T,Lee Y P,Jurng J.Spherical-shaped Ice Particle Production by Spraying Water in a Vacuum Chamber[J].Applied Thermal Engineering,2000,20(5):439-454.
[3]Muthunayagam A E,Ramamurthi K,Robert P J.Modeling and Experiments on Vaporization of Saline water at Low Temperatures and Reduced Pressures[J].Applied Thermal Engineering,2005,25(5/6):941-952.
[4]Cheng W L,Chen H,Hu L,et al.Effect of Droplet Flash Evaporation on Vacuum Flash Evaporation Cooling:Modeling[J].International Journal of Heat and Mass Transfer 2015,84:149-157.
[5]Isao Satoh,Kazuyoshi Fushinobu,Yu Hashimoto.SphericalShaped Ice Particle Production by Spraying water in Vacuum Chamber.Applied Thermal Enginering,2000,20(5):439-454.
[6]Hohmann J,Renz U.Numerical simulation of fuel sprays at high ambient pressure:the influence of real gas effects and gas solubility on droplet vaporization[J].Int.J.Heat and Mass Transfer.2003,46:3017-3028;
[7]Gogos George,Soh Siang,Pope Daniel N.Effects of gravity and ambient pressure on liquid fuel droplet evaporation[J].Int.J.Heat and Mass Transfer,2003,46:283-296.
[8]Adachi M,Mc Donell V G,Tanaka D,et al.Characterization of Pue1Vapor Concentration Inside a Flash Boiling Spray[C]//International Congress&Exposition;Detroit,Michigan,1997.