内置转子换热管强化传热性能研究  

Heat transfer enhancement performance of a tube fitted with rotors

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

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2012年第3期96-100,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：北京市自然科学基金(3102023);国家科技支撑计划重大项目(2011BAA04B02)

摘　　要：概述了转子组合式强化传热装置的强化传热和自清洁原理,实验研究了阶梯对螺旋叶片转子强化传热性能的影响。实验结果表明,在相同的雷诺数条件下,内置阶梯型螺旋叶片转子换热管的努塞尔数及阻力系数较无阶梯的螺旋叶片转子分别高出了7.8%～13.1%和24.1%～33.8%,同时性能评价因子(PEC)明显高于无阶梯的螺旋叶片转子,从而验证了阶梯可明显提高螺旋叶片转子强化传热的综合性能。The principles underlying the rotors-assembled device for heat transfer enhancement and automatic cleaning are introduced in this paper.Experiments were carried out in order to study the effect of incorporating ladders on heat transfer enhancement performance of helical blade rotors.The experimental results showed that the Nusselt number and friction factor of a tube with an inserted helical blade rotor with ladders were respectively 7.8%-13.1% and 24.1%-33.8% higher than the corresponding values for a tube with a helical blade rotor without ladders.Furthermore,the performance evaluation criteria（PEC） values for the helical blade rotor with ladders were higher than those for the helical blade rotor without ladders,which confirms that the ladders can enhance the heat transfer performance of a helical blade rotor.

关 键 词：转子组合式 强化传热 阶梯 螺旋叶片 综合性能 

分 类 号：TK172[动力工程及工程热物理—热能工程]