折流杆换热器中折流杆形状对流动和传热特性的影响  

Effects of Flow and Heat Transfer Characteristics on Rod Shapes in Rod Baffle Heat Exchanger

作　　者：王英双[1] 马雷[1] 韦杰[1] 刘志春[1] 黄素逸[1] 刘伟[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《水电能源科学》2010年第11期128-130,共3页Water Resources and Power

基　　金：国家重点基础研究发展计划基金资助项目(2007CB206903)

摘　　要：采用数值计算方法,以水为流动介质研究了不同类型的折流杆式换热器,并分析了其流动与传热特性。在Re为3 000~21 000时,方杆的换热效果明显优于圆杆,最多高出圆杆40%~50%,但其阻力最多却增加了3倍。采用h/ΔP作为综合性能评价参数,结果表明折流杆的形状为圆杆时综合换热效果最好。On the basis of different types of rod baffle,the flow and heat transfer characteristics in shell side of heat exchanger with water as the fluid media are numerically investigated.The results show that with Re number ranged from 3 000 to 21 000,heat transfer enhancement effect of square rod baffle is obviously better than that of round rod baffle,and the maximum difference is about 40% to 50% higher than that of round rod baffle;meanwhile,the resistance of square rod baffle is 3 times bigger than that of round rod baffle.With h/ΔP as the comprehensive performance evaluation parameter,the result demonstrates that the round rod baffle appears the best effect than others.

关 键 词：强化传热 换热器 折流杆 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程]