倾斜角度对流动沸腾换热影响的实验研究  

THE EXPERIMENTS OF INCLINATION EFFECT ON FLOW BOILING HEAT TRANSFER

作　　者：胡锦昌[1] 孙晨[1] 徐向华[1] 梁新刚[1] 

机构地区：[1]清华大学航天航空学院,热科学与动力工程教育部重点实验室,北京100084

出　　处：《工程热物理学报》2011年第1期101-103,共3页Journal of Engineering Thermophysics

摘　　要：本文对直管和螺旋管在不同倾角下的换热特性进行了实验研究和比较,获得了二者随着热流密度和质量流量变化时不同倾角下的平均换热系数。实验结果表明,倾角对直管和螺旋管的平均换热系数的影响都不大,不同倾角下平均换热系数最大差别对于直管约为10%,对于螺旋管则为20%。Flow boiling heat transfer characteristics in straight pipe and coiled pipe were experimentally investigated and compared.The average heat transfer coefficients under variable inclination angle were obtained when heat flux and mass flow changed.Experimental results showed that on both straight pipe and coiled pipe,the inclination effect on average heat transfer coefficient was not large.For straight pipe,the difference of average heat transfer coefficients at different angles was about 10%,and for coiled pipe was about 20%.

关 键 词：倾斜角度 流动沸腾 重力无关 蒸汽压缩热泵系统 

分 类 号：TK121[动力工程及工程热物理—工程热物理]