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对相变材料微胶囊(MEPCM)-水悬浮液在矩形小通道内的层流流动摩擦阻力特性进行了实验研究.实验中使用的MEPCM颗粒平均粒径为4.97μm,与蒸馏水混合制备成质量浓度为0~20%的各种悬浮液.实验对MEPCM质量浓度对悬浮液在小通道内流动的摩擦因子以及压降的影响进行了研究.悬浮液流动的Reynolds数范围是200~2000,以实现小通道内层流和转捩流动.实验发现,MEPCM质量浓度为0和5%的悬浮液的实验数据与连续性牛顿流体的充分发展流动的理论值符合的很好;对于MEPCM质量浓度高于10%的悬浮液,它们的流动摩擦因子以及压降明显高于牛顿流体的层流理论值.
The flow friction resistance of laminar flow of phase-change material microcapsule (MEPCM) -water suspension in a rectangular small channel was investigated experimentally.The average particle size of MEPCM particles used in the experiment was 4.97μm, mixed with distilled water to prepare mass concentration Is 0 ~ 20% of the various suspensions.MEPCM mass concentration of the suspension in the small channel flow friction factor and the pressure drop was studied.The suspension flow Reynolds number range is 200 ~ 2000, in order to achieve The experiments show that the experimental data of MEPCM suspensions with mass concentrations of 0 and 5% are in good agreement with the theoretical values of the continuous flow of Newtonian fluids. For MEPCM with mass concentration higher than 10% of the suspension, their flow friction factor and pressure drop significantly higher than the Newtonian fluid laminar flow theory.