电场强化夹套间不同构造管对流传热研究  

Research on electro-hydro-dynamics enhancement in convection heat transfer of kinds of tubes in annulus

作　　者：陈志静[1] 罗小平[1] 高贵良[1] 

机构地区：[1]华南理工大学工业装备与控制学院,广东广州510640

出　　处：《化学工程》2009年第2期19-22,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(20676039;20006004);广东省自然科学基金项目(000412)

摘　　要：文中以空气为工质,对水平光管、横纹管、花瓣管在夹套间的强制对流传热进行了高压电场强化(EHD效应)实验研究,揭示了EHD在强化对流传热上的一些基本规律。实验结果表明,外加高压电场对强化对流传热有较好的综合效果,在Re=5000,电极电压为30 kV的实验条件下,花瓣管、横纹管和光管的最大强化率依次为2.76,1.75和1.36。根据光管的实验结果,对有、无电场作用下的压力波动进行了时间序列分析,得出了Lyapunov指数,并从动力学角度分析了EHD效应对强化传热的影响。An experiment was performed for the forced convective heat transfer of air through smooth tube, traverse corrugated tube and petal-shaped fin tube under direct current high voltage in annulus. Some convective heat transfer rules of electro-hydro-dynamics （EHD）enhancement were studied. The experiment results show that the direct current high voltage has favorable heat transfer effect on forced convective heat transfer. When Re is 5 000, the voltage is 30 kV, for the thimble experiment, the maximal intensifying rate of petal tube, traverse corrugated tube and smooth tube are 2.76, 1.75 and 1.36, respectively. According to the experimental results, Lyapunov exponential was obtained, and the effect of EHD on the heat transfer enhancement was surveyed from the viewpoint of dynamics.

关 键 词：EHD 强化传热 混沌 

分 类 号：TK124[动力工程及工程热物理—工程热物理]