高校化学工程学报2011，Vol.25Issue(4)：559-564,6.
微通道中纳米流体流动沸腾换热性能研究
Flow Boiling Heat Transfer Performance of Nanofluids in a Microchannel
摘要
Abstract
In order to investigate the flow boiling heat transfer performance of nanofluids in microchannel, a single rectangular silicon microchannel with the hydraulic diameter of 143μm was designed, and the simultaneous measurement and visualization experimental systems were set up. The nanofluid with A12O3 nanoparticles (mass fraction = 0.2%) and pure water were used respectively as the working fluids in the microchannel; the wall temperature and system pressure drop variations of the microchannel during the flow boiling of the two working fluids were compared. According to the results of comparison and combining with the observed simultaneous change in flow pattern, the flow boiling performances of nanofiuids were studied. The results show that the flow boiling pattern in the microchannel changes when the nanoparticles were added in the fluid, which causes that the small bubbles and bubbly flow appear in the microchannel during flow boiling, and the boiling heat transfer in the microchannel is strengthened, the fluctuations of wall temperature and system pressure drop decrease. During the boiling instable period, the heat flux significantly increases, and the appearance of the OFO (onset of flow oscillation) point of the system is obviously delayed, so that the stable boiling region of the system becomes larger. In short, using nanofluids as the working fluid can curb the flow boiling instability and improve the heat transfer and flow boiling performance in the microchannel.关键词
纳米流体/流动沸腾/微通道/沸腾换热/沸腾不稳定性Key words
nanofluids/ flow boiling/ microchannel/ boiling heat transfer/ boiling instability分类
能源科技引用本文复制引用
徐立,李玉秀,徐进良,刘国华..微通道中纳米流体流动沸腾换热性能研究[J].高校化学工程学报,2011,25(4):559-564,6.基金项目
国家杰出青年基金项目(50825603) （50825603）
国家自然科学青年基金项目(50906088). （50906088）
