摘要
针对水平光滑管和微肋管,基于FLUENT平台对制冷剂管内沸腾传热特性进行了数值模拟,研究质量流量、热流密度及干度等因素对制冷剂R245fa沸腾换热系数的影响。模拟结果表明：沸腾换热系数随着制冷剂质量流速与热流密度的增加而提高;随着干度的增加,换热系数先增加再降低,并在x=0.7时达到极大值;相比光滑管,微肋管内制冷剂的沸腾传热系数能提高10%~25%。
Based on the FLUENT software,the numerical simulation of boiling heat transfer inside a smooth and micro-fin tube was carried out for R245 fa which was a new type of refrigerant. The effects of mass flow rate,heat flux and vapor quality on the boiling heat transfer coefficient were discussed. The simulated results show that boiling heat transfer coefficient increases with the mass flow rate and heat flux.And R245 fa has the maximum heat transfer coefficient at the vapor quality of 0.7. The boiling heat transfer coefficient of R245 fa is 10%~25% higher than that of smooth tube.
出处
《工业加热》
CAS
2015年第1期32-34,共3页
Industrial Heating
基金
湘潭大学博士基金(13QDZ04)
全国大学生创新性实验项目(2013XTUSJ04)
关键词
数值模拟
沸腾传热
制冷剂
FLUENT
numerical simulation
boiling heat transfer
refrigerant
FLUENT
