自然对流对吸热管内熔盐对流传热的影响  

Effect of Natural Convection on Convective Heat Transfer in a Receiver Tube

作　　者：沈向阳[1] 丁静[2] 陆建峰[2] 

机构地区：[1]仲恺农业工程学院机电工程学院,广东广州510225 [2]中山大学工学院,广东广州510006

出　　处：《当代化工》2015年第7期1628-1631,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金重点项目;项目号:51436009;广东普通高校青年创新人才项目;项目号:KA1548823

摘　　要：以熔盐为传热工质,对考虑熔盐自然对流情况下吸热管内传热进行了数值模拟。结果表明:同一Re数,吸热管内各熔盐入口温度的下侧Nu数大于上侧Nu数,熔盐入口温度越高Nu数越小,其管内下、上侧Nu数的差值越大。随着吸热管向上角度的增加,管内下侧Nu数逐渐减小,上侧Nu数逐渐增加,但各吸热管的平均Nu数基本一致。The effect of molten salt natural convection on convective heat transfer in a receiver tube was simulated. The simulated results show that the Nusselt number of receiver tube downside part is higher than that of upside part at the same Reynolds number with different inlet temperature, the Nusselt number decreases with inlet temperature increasing, but the value difference between Nusselt number downside part and upside part increases. The Nusselt number of receiver tube downside part reduces with upward angle increasing, but that of the upside part increases, and the average Nusselt number in receiver tube is almost equal.

关 键 词：吸热管 自然对流 熔盐 对流传热 

分 类 号：TQ013[化学工程]