板式脉动热管内气液两相流流型演化及传热分析  

Analysis of two-phase flow patterns transition and heat transfer in flat plate loop pulsating heat pipe

作　　者：徐德好[1,2] 陈陶菲[2] 刘向东[3] 张程宾[3] 郝英立[4] 

机构地区：[1]南京理工大学能源与动力工程学院,南京210096 [2]南京电子技术研究所,南京210039 [3]东南大学能源与环境学院,南京210096 [4]东南大学空间科学与技术研究院,南京210096

出　　处：《东南大学学报（自然科学版）》2011年第3期558-562,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51078074);江苏省科技支撑计划资助项目(BS2008667);教育部科学研究重大资助项目(308010)

摘　　要：基于VOF方法建立了板式脉动热管内气液两相流动和相变传热的三维非稳态数学模型,并进行了数值求解.研究了该型热管内气液两相流流型演化和相变传热特性,比较了不同加热功率条件下热管内的流型和温度分布.研究结果表明:该板式脉动热管在运行过程中出现的主要流型有泡状流、柱塞流、环状流;当加热功率为100和120 W时,启动工况下热管内总气相含气率会出现飞升;稳定循环运行工况下热管各点温度随时间做有规律的周期性脉动,加热段脉动幅度最大,绝热段次之,冷却段最小,温度脉动频率随着功率的增大而升高.Based on the VOF（volume of fluid） method,a three-dimensional unsteady model of vapor-liquid two-phase flow and heat transfer in a flat-plate pulsating heat pipes（FP-PHP） is developed and numerically analyzed to study the flow pattern transition and heat transfer in the FP-PHP.The effects of the heat load on temperature oscillation and distribution,and the thermal performance of FP-PHP were all investigated and discussed.The results indicate that the main flow patterns,including bubbly flow,slug flow and semi-annular/annular flow,are observed in FP-PHP.During start-up,the total volume fraction in the FP-PHP drastically increases until to the condition of steady directional circulation under the heating power of 100 and 120 W,while a periodical oscillation of fluid temperature occurs.The oscillation amplitude at adiabatic section is larger than that at condenser section but less than that at evaporator section.In addition,with increasing heat load,the temperature oscillation frequency increases.

关 键 词：板式脉动热管 流型 温度脉动 数值模拟 

分 类 号：TK172.4[动力工程及工程热物理—热能工程] O359.1[理学—流体力学]