制冷剂在微流道内单相流动的阻力与换热特性

Friction and Heat Transfer Characteristics of Single Phase Flow of Refrigerant in Microchannels

摘要: 对典型制冷剂R12在微流道中的单相流动阻力特性和换热特性进行了实验研究.实验结果表明,微流道中的流动力及换热特性与常规尺度流道中的有很大差异.层流的阻力系数高于常规尺度流道中的阻力系数,流态由层流向紊流过渡的临界雷诺数也比常规尺度流道减小.

Abstract: The expeimental investigation on the friction and heat transfer characteristics of single phase flow of typical refrigerant R12 in microchannels have been obtained, Results from experiments indicate that there is great departures from microchannel to conventional size channel. The friction coefficient in microchannel is bigger than that in conventional size channel, while the critical Reynolds number decreases.