转子结构参数对管内阻力与换热特性的影响  

Effect of Rotors' Structural Parameters to the Flow and Heat Transfer Characteristics in a Circular Tube

作　　者：朱晓磊[1] 孟继安[1] 李志信[1] 

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

出　　处：《工程热物理学报》2015年第5期1038-1041,共4页Journal of Engineering Thermophysics

基　　金：国家科技支撑项目(No.2011BAA04B02);国家"973"计划资助项目(No.2013CB2283001)

摘　　要：研究了内插不同结构参数直线型转子的管内流动阻力和传热特性,结果表明,直线型转子在阻力增加1~1.5倍的前提下,强化换热30%~50%,分析发现,15°螺旋叶片角、凸形直线段截面结构以及与换热管内径相当的回转直径的直线型转子能在阻力增加不大的情况下显著强化换热。The flow and heat transfer characteristics in a circular tube with straight frame rotor inserts of various structural parameters were researched.The results show that on the premise of flow resistance is increased 1~1.5 times,the heat transfer is enhanced by 30%~50%with straight frame rotor inserts.The analyses indicate that a blade of 15° helical angle,a sweeper rod of convex cross-section and a similar gyration diameter to the inner diameter of a heat exchanger tube can enhance the heat transfer remarkably with less flow resistance increase.

关 键 词：直线型转子 强化换热 流动阻力 结构参数 

分 类 号：TK172[动力工程及工程热物理—热能工程]