摘要
利用纵向涡发生器在窄间隙矩形通道内产生的纵向涡可以起到强化传热的作用。运用CFD商业软件CFX10.0对带纵向涡发生器的窄间隙矩形通道内的汽液两相介质进行了模拟计算。结果表明,产生的纵向涡能有效地降低窄间隙矩形通道的边角处热量集中,提高中央主流区流速,进而明显提高加热板上的热流密度;LV也能加强通道内冷热流体交混,起到强化传热的作用。在本文参数范围内,相对于光滑通道而言,带LVG的窄间隙矩形通道在适当增加流动阻力的基础上,能明显提高传热效率。
Heat transfer can be improved by longitudinal vortex （LV） generated by longitudinal vortex generators（LVG） in narrow rectangular channel. The CFX 10.0 is one kind of CFD commercial software, used to simulate vapor-liquid two-phase medium. The results show that the edge of narrow rectangular channel may be cooled by LV generated by LVG, and the flow velocity is improved in the center of channel, so the heat flux of hot plate can be improved obviously. At the same time, the mixing of cold and hot fluid may be enhanced by LV. Comparing with smooth channel, the efficiency of heat transfer is increased obviously with resistance of flow increases properly within the range of this paper.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2008年第3期99-103,共5页
Nuclear Power Engineering
基金
国家自然科学基金(No.50576089)
空泡物理和自然循环国家重点实验室基金(No.9140C7101030602)资助
关键词
CFD程序
纵向涡
强化传热
窄间隙矩形通道
CFX10.0
CFD software, Transverse vortex, Enhancement of heat transfer, Narrow rectangular channel, CFX10.0
