作　　者： ; ; ; ;

机构地区： 中国科学院广州能源研究所

出　　处： 《化工学报》 2009年第5期1156-1161,共6页

摘　　要： The microbubble behavior on platinum microheaters immersed in parallel microchannels during flow boiling was experimentally investigated,with the heater driven by pulse-heating.With increasing heat flux of rear face heater,three representative types of microbubbles,corresponding to three instable tendencies were identified.The relations between boiling instability and bubbles behavior were analyzed.The conclusions indicated that transitions among these bubbles and various departure modes strongly depended on the instability of flow boiling in microchannels.Meanwhile,heating power of the rear face heater was also one of the main factors that affected bubbles incipience and diameters.The results of present study can provide powerful basis for the future design of new micro-fluid functional devices. The microbubble behavior on platinum microheaters immersed in parallel microchannels during flow boiling was experimentally investigated, with the heater driven by pulse-heating. With increasing heat flux of rear face heater, three representative types of microbubbles, corresponding to three instable tendencies were identified. The relations between boiling instability and bubbles behavior were analyzed. The conclusions indicated that transitions among these bubbles and various departure modes strongly depended on the instability of flow boiling in microchannels. Meanwhile, heating power of the rear face heater was also one of the main factors that affected bubbles incipience and diameters. The results of present study can provide powerful basis for the future design of new micro-fluid functional devices.

关 键 词： 微汽泡 铂膜微加热器 脉冲加热 流动沸腾不稳定性

领　　域： [动力工程及工程热物理] [动力工程及工程热物理]