[1]刘永启,李瑞阳,郁鸿凌,等.圆柱形和带状电极的EHD强化管内沸腾换热[J].南京理工大学学报(自然科学版),2006,(03):261-264.
 L IU Yong-qi,L I Ru-i yang,YU Hong-ling,et al.EHD Enhancement of Boiling Heat Transfer in-tube Using Cylindrical-rod and Flat Bar Electrodes[J].Journal of Nanjing University of Science and Technology,2006,(03):261-264.
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圆柱形和带状电极的EHD强化管内沸腾换热
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
期数:
2006年03期
页码:
261-264
栏目:
出版日期:
2006-06-30

文章信息/Info

Title:
EHD Enhancement of Boiling Heat Transfer in-tube Using Cylindrical-rod and Flat Bar Electrodes
作者:
刘永启1 李瑞阳2 郁鸿凌2 王发刚3 王延遐1
1. 山东理工大学交通与车辆工程学院, 山东淄博255049; 2. 上海理工大学动力工程学院, 上海200093; 3. 山东理工大学科技处, 山东淄博255049
Author(s):
L IU Yong-qi1 L I Ru-i yang2 YU Hong-ling2 WANG Fa-gang3 WANG Yan-x ia1
1.College of Traffic and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China;2.College of Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;3.Office of Science and Technology,Shandong University of Technology,Zibo 255049,China
关键词:
电水动力学 强化传热 沸腾换热 电场 电极形状
Keywords:
electrohydrodynam ics hea t transfer enhancement boiling heat transfer electric fie ld electrode con figuration
分类号:
TK 124
摘要:
以R-123为工质,采用带状电极和圆柱电极研究了电极形状对电水动力学(EHD)强化垂直管内核沸腾换热的影响。试验换热管为垂直套管式,外层为加热水路,内层为工质回路,中心布置着电极。电场强度范围为0~2.133 MV/m,热流密度范围为1.5~10.0 kW/m2,换热系数的误差为±9.7%;相应的强化因数的误差为±12.2%。结果表明:带状电极和圆柱电极的最大强化效果基本相同,但带状电极达到最大强化效果时所需要施加的平均电场强度和能耗低于圆柱电极,这对于工程实际应用具有重要的意义。从外加电场影响汽泡的成长、跃离和运动规律的角度对试验结果进行了初步的分析。
Abstract:
Basic experiments are performed to investigate EHD ( E lectrohydrodynam ics) enhancement o f bo iling heat transfer forR- 123 in a vert ica l tube using the cylindrica-l rod and flat bar electrodes. The test rig consists of a vertica lmounted tube-in-tube heat exchangerw ith hotw ater f low ing in the outer tube and the test refrigerant flow ing in the inner one in wh ich two e lectrodes aremounted respective ly. E lectric f ie ld streng th ranges from 0 to 2. 133MV /m, and heat flux ranges from 115 to 10 kW /m2. Uncerta inty of the heat transfer coeffic ients is ? 917% , and that o f the enhancemen t facto rs is ? 1212% . It is demonstrated tha t the max imum enhancemen t factors o f two electrodes are about the same, but the average electric field strength and the energy consumption atw hich themaximum enhancem ent factors occurr for the flat bar e lectrode are low er than those of the cy lindrica-l rod electrode. The experimental phenomena are ana lyzed and d iscussed in v iew of the effect of electric field on grow th rate, departure and movement behav iors o f bubbles.

参考文献/References:

[ 1] 李瑞阳, 施伯红, 郁鸿凌, 等. EHD强化水平管外沸 腾换热的试验研究[ J]. 工程热物理学报, 2000, 21 ( 1): 97- 100.
[ 2] 刘永启, 李瑞阳, 郁鸿凌, 等. 圆柱形和三角形电极 EHD强化管内沸腾换热的试验研究[ J]. 清华大学 学报, 2003, 43( 12): 1 683- 1 686.
[ 3] Cheung K H, OhaddiM M, Dessiatoun S, et a.l EHDenhanced bo iling coeffic ients and v isua lization of R134a over enhanced tubes [ J]. Trans ASME, J H eat Transfer, 1997, 119: 332- 338.
[ 4] Ka ray iann is T G, Xu Y. E lec tric field e ffect in bo iling heat transfer ( Pa rt B) : E lec trode geom e try [ J]. J Enhanced H ea t Transper, 1998, 5: 231- 247.
[ 5] Paschkew itz J S, Pratt DM. E lectrodynam ica lly ( EHD) hea t transfer enhancement in an av iation work ing flu id: Effect of e lectrodematerial and polarity [ J]. J Enhanced H eat Transper, 2000, 7: 371- 383.

备注/Memo

备注/Memo:
基金项目: 国家“973“项目( G2000026302); 上海市基础研究重点项目( 02DJ14049) 作者简介: 刘永启( 1965- ), 男, 山东枣庄人, 教授, 博士, 主要研究方向: 强化传热, E-m ail:liuyq65@ 163. com。
更新日期/Last Update: 2006-06-30