相间内插两种转子换热管的换热及阻力特性  

Heat Transfer and Flow Resistance Features of Tubes Inserted with Two Kinds of Alternative Rotors

作　　者：姜鹏[1] 杨卫民[1] 张震[1] 丁玉梅[1] 阎华[1] 关昌峰[1] 

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《机械设计与制造》2013年第2期169-171,共3页Machinery Design & Manufacture

基　　金：北京市自然科学基金资助项目(3102023);国家科技支撑计划项目课题资助(2011BAA04B02)

摘　　要：对相间内插螺旋开槽转子与低流阻转子不同数目比(Y)转子的圆管进行了换热及阻力特性的实验研究,结果表明,相间内插两种转子后明显对换热效果产生影响,换热效果和阻力特性与两种转子数目比Y有关。阻力系数(f)随着Y值的增大而增加,在所有相间排列方案中,螺旋开槽转子与低流阻转子的数目比Y=2时,换热效果最好,平均努赛尔数(Nu)和阻力系数(f)均比单一螺旋开槽转子高,努赛尔数(Nu)较螺旋开槽转子提高4%左右。Experimental investigation of heat transfer and flow resistance features of tubes inserted with alternative rotors(spiral slot rotors and low flow resistance rotors) of different number ratio(Y) has been performed.The results show that alternative rotors have influence on heat transfer.The effect of heat transfer and friction factor are relative to the number ratio Y.The friction factor increases with the increase in number ratio(Y).Among the alternative rotors examined,the one with the largest number ratio of Y=2 is the most efficient for heat transfer enhancement.Both average Nusselt number(Nu) and friction factor(f) of tubes with alternative rotors of Y=2 are higher than typical spiral slot rotors.Nu of Y=2 is 10 percent larger than typical spiral slot rotors.

关 键 词：转子 换热 阻力系数 实验研究 

分 类 号：TH16[机械工程—机械制造及自动化] TK172[动力工程及工程热物理—热能工程]