流体在组合式吸液芯中的流动阻力  

Flow resistance through combined heat pipe wick

作　　者：白穜[1] 张红[1] 许辉[1] 丁莉[1] 

机构地区：[1]南京工业大学能源学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第1期56-60,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA052419);国家自然科学基金资助项目(51076062)

摘　　要：对水在组合式多孔吸液芯中的流动阻力进行了试验研究和数值模拟,分析其中金属纤维毡的厚度和水的流动状态对组合式吸液芯中流动阻力的影响。通过试验得出了组合式吸液芯的渗透率以及流动阻力压降的表达式。研究表明:组合式吸液芯的渗透率随着金属纤维毡的厚度增加而减小,在金属纤维毡厚2、3和4mm时,渗透率分别为336×10^(-12)、242×10^(-12)、104×10^(-12)m^2。水在湍流状态时需要考虑惯性效应对流动阻力的影响,且流速越大影响越大。在准确获得渗透率和惯性摩擦系数的前提下,Fluent 6.3能较为准确地模拟流体在组合式吸液芯内的流动情况。The experiment and the numerical research on flow resistance of water through the combined heat pipe wick were carried out.The influence of the depth of metal felt and the flow state on flow resistance in combined heat pipe wick was analyzed.The results indicated that the permeability of combined heat pipe wick decreased while the depth of the metal felt increased.The permeability was 336×10^（-12）m^2,242×10^（-12） m^2 and 104×10^（-12） m^2 when the depth of the metal felt stay 2,3 and 4 mm.The inertia effect on the flow resistance needed to be considered when the water was in turbulent state,and the faster the velocity of water,the bigger the effect.The Fluent 6.3 could be used to simulate the flow conditions in combined heat pipe wick after obtaining the permeability and the inertia resistance coefficient.

关 键 词：组合式吸液芯 渗透率 惯性效应 金属纤维毡厚度 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]