大管径闭环脉动热管传热特性研究  

Experimental investigation on heat transfer performance of closed-loop pulsating heat pipe with large inner diameter

作　　者：韩晓红[1] 郑豪策 王学会[1] 高旭 鹿丁 陈光明[1] 

机构地区：[1]浙江大学制冷低温研究所浙江省制冷与低温技术重点实验室,杭州310027 [2]航天低温推进剂技术国家重点实验室,北京100028

出　　处：《低温工程》2015年第5期23-27,44,共6页Cryogenics

基　　金：航天低温推进剂技术国家重点实验室基金课题(No.SKLTSCP1205;No.SKLTSCP1314)

摘　　要：设计了一种内径为4 mm的大管径闭式脉动热管实验装置,并通过实验研究了脉动热管的启动特性与热流密度、充液率对其传热性能的影响。实验结果表明:在脉动热管启动过程中存在两种不同启动过程;在其运行过程中热阻随着热流密度的上升而下降;在不同热流密度下,均存在最佳充液率且为0.4左右。同时,通过与2 mm内径的脉动热管传热性能对比,说明了4 mm脉动热管的传热优势。An experimental setup of a closed pulsating heat pipe（ PHP） with 4 mm inner diameter was built. The start-up pattern and the effects of the heat fluxes and filling ratios were investigated. The experimental results indicated that there existed two types of start-up pattern. Moreover,thermal resistance decreased with the increasing of the heat fluxes. For the tested PHP with different heat flux,there existed an optimum filling ratio which is about 0. 4. Furthermore,by compared with the heat transfer performance of 2mm inner-diameter PHP,it confirmed the advantages of the closed-loop PHPs with 4 mm inner-diameter.

关 键 词：脉动热管 大管径 烧干 热阻 

分 类 号：TB657[一般工业技术—制冷工程] TB611