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本文对金属多孔气液分离强化传热结构单相流中传热性能进行了分析.分别研究了粉末颗粒形状、粉末颗粒大小对传热性能的影响.测试样品分别为采用五组不同参数粉末颗粒进行烧制,其中2组为球状粉末样品(颗粒大小为75～100 μm,100～125μm),3组枝状粉末样品(颗粒大小为＜25 μm,100～125 μm,＞150 μm).水作为工作介质.样品雷诺数测试范围为3654～14617.研究结果表明,粉末颗粒大小对传热性能有重要影响,对于枝状粉末颗粒样品,粉末颗粒尺寸为100～125 μm样品换热性能最好;粉末颗粒形状对传热也有较大影响,同枝状粉末颗粒样品相比,球形粉末颗粒样品传热系更高,但产生的流动阻力也高,综合换热性能,球形粉末不如枝状粉末.“,”In this paper,an experimental testing is carried out to investigate the heat transfer performance of a circular tube with porous media inserts in the single phase flow.The effect of particle size and particle shape on the heat transfer performance is analyzed.Five groups of testing samples are used in the paper,in which two groups of samples were made of spherical powder samples (particle size of 75～100 μm,100～125 tm) and three groups of testing samples are made of dendritic powder (particle size is ＜25 tm,100～125 tm,＞150 tm).Tap water is used as the working fluid.The testing range of the Reynolds number is between 3654 and 14617.The results show that the best thermal performance is resulted by the sample with particle size of 100～125 μm for dendritic particles.Compared with the dendritic particles,the spherical particles can achieve a high heat transfer rate.However,it also brings a high flow resistance.As a result,the heat transfer performance of spherical particle performs worse than the dendritic particle.