摘要
针对磁性液体脉动热管传热性能及其影响因素问题,在风洞试验台上,采用电加热方式对13种水基Fe_3O_4磁性液体脉动热管及1根水工质脉动热管传热性能进行了试验研究。测量了磁性液体工质质量浓度(1. 5%,3%,4. 5%,9%,12%)、热管冷热段长度比(12∶14,14∶12,16. 5∶9. 5)、充液率(30%,50%,70%)、结构形式(等高,渐高,高低结构)、外磁场强度及作用角度,随电加热功率变化下的脉动热管传热性能,对脉动热管性能影响规律进行了对比分析与归纳。研究结果表明:4. 5%磁性液体质量浓度,50%充液率,冷热段长度比为14∶12,8弯头等高结构且在无外加磁场下的脉动热管传热性能最优;热阻最小值较水工质脉动热管降低了85%,并且热传导系数较紫铜导热系数提高了340倍。
Aiming at the heat transfer performance and influence factors of the oscillating heat pipe( OHP),on air cooling and electric heating experimental conditions,a water medium OHP and 13 kinds of Fe3O4 magnetic liquid OHPs were tested. The fluid ’s concentration( 1. 5%,3%,4. 5%,9%,12%),length-heat segment length ratio( 12 ∶ 14,14 ∶ 12,16. 5 ∶ 9. 5),filling rate( 30%,50%,70%),structural changes,the magnetic field and angle and the heating power were included in test item. The influence law of OHPs were analyzed and summarized. The results indicate that the OHP with 4. 5% mass concentration,50% filling rate,14 ∶ 12 length ratio,8 elbows,contour structure and nonmagnetic has the best heat transfer performance,the minimum thermal resistance is 85% lower than the water medium OHP,and the thermal conductivity is 340 times higher than copper.
作者
唐正男
苏磊
TANG Zheng-nan;SU Lei(School of Energy Science and Engineering,Nanjing Technology University,Nanjing 211186,China)
出处
《机电工程》
CAS
北大核心
2018年第12期1319-1323,共5页
Journal of Mechanical & Electrical Engineering
基金
江苏省科技计划资助项目(BE2013129)
关键词
脉动热管
水基Fe3O4磁性液体
传热性能
热导率
pulsating heat pipe
water-base Fe3O4magnetic fluid
heat-transfer performance
heat-conducting property
