电流体力学
材料科学
机械
压力降
同轴
传热系数
传热
热交换器
电极
强化传热
沸腾
核沸腾
热流密度
临界热流密度
热力学
复合材料
电气工程
化学
物理
物理化学
工程类
作者
James Cotton,A.J. Robinson,Jen‐Shih Chang,M. Shoukri
出处
期刊:Journal of Enhanced Heat Transfer
[Begell House Inc.]
日期:2008-01-01
卷期号:15 (3): 183-198
被引量:5
标识
DOI:10.1615/jenhheattransf.v15.i3.10
摘要
An experimental investigation has been conducted to study the effect of electrode position on electrohydrodynamic (EHD) augmentation of flow boiling heat transfer in a horizontal channel. The experiments were conducted for boiling HFC-134a on the tube-side of a coaxial heat exchanger for dc voltage from 0 to 8 kV, liquid mass flux up to 500 kg/m2·s, inlet quality from 0 to 50%, and three vertical electrode positions within the tube (0 mm and ±2.73 mm from the centreline). Both local and global measurements of the heat transfer are presented along with an evaluation of the influence of the imposed electric field on the overall pressure drop. With the inner electrode raised upwards, a 1.6 fold increase in the heat transfer coefficient has been observed for a modest voltage level of 2 kV and pressure drop penalty of 20%. This level of enhancement in heat transfer is similar to the one obtained with coaxial electrodes at an applied voltage approximately three times lower.
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