摘要
为了改善粘性流体在换热管内的流动传热性能,以水为工质,在管内有间隔地插入交叉半椭圆片,建立了相应的物理和数学模型,并对其传热与流动特性进行了数值模拟,同时与光滑管传热性能进行对比。研究结果表明:在圆管内插入交叉半椭圆片可以有效的提高综合传热性能,其综合性能评价因子PEC在1.1-1.95之间。
To improve the flow and heat transfer performance of a viscid fluid inside a heat exchange tube,cross semi-elliptical plates were inserted at an interval inside the tube and with water serving as the working medium,a corresponding physical and mathematical model was established with its heat transfer and flow characteristics being numerically simulated.In the meantime,its heat transfer performance was compared with that of a bare tube.The research results show that to insert cross semi-elliptical plates into a round tube can effectively enhance its comprehensive heat transfer performance and its comprehensive performance evaluation coefficient( PEC) may range from 1.1;1.95.
出处
《热能动力工程》
CAS
CSCD
北大核心
2014年第6期639-644,756,共6页
Journal of Engineering for Thermal Energy and Power
基金
国家科技部国际科技合作专项(2013DFG60080)
广州市科技计划项目(2012J5100003)
关键词
交叉半椭圆片
数值模拟
传热
流动
场协同分析
cross semi-elliptical plate,numerical simulation,heat transfer,flow,field synergy analysis
