缝隙冲击射流换热数值模拟  

Numerical simulation on heat transfer of impinging slot jet

作　　者：刘国勇[1] 李谋渭[1] 王邦文[1] 张少军[1] 李生勇[1] 黄艳[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《北京科技大学学报》2006年第6期581-586,608,共7页Journal of University of Science and Technology Beijing

基　　金：国家"九五"科技攻关项目(No.95-528-03)

摘　　要：采用标准k-ε模型对非淹没缝隙射流冲击区单相对流换热进行数值模拟.考虑冲击区对流换热的因素有射流的速度、射流出口距冲击板的距离(高度)、喷嘴的宽度、射流出口速度方向与冲击板之间的夹角、冲击板的温度及水温等.研究结果表明:射流速度对冲击区的换热影响最显著,其次是水温及喷嘴的宽度,而射流出口速度方向与冲击板的夹角只影响局部换热系数的分布.Numerical simulation with the standard k -ε model was performed to study single-phase convective heat transfer at the impinging zone of non-immersed slot jet. The factors considered were jet velocity, spacing of nozzle-to-impinging plate （height）, slot width, angle between jet direction and plate, temperatures of impinged plate and water （liquid） from the slot nozzle. The results show that jet velocity is the most remarkable factor influencing heat transfer at the impinging zone, and other factors such as water temperature and slot width are also non-negligible. The angle between jet direction and impinging plate only influences the distribution of local convective heat transfer coefficient.

关 键 词：缝隙 冲击射流 对流换热 k-ε模型 数值模拟 

分 类 号：TG155.3[金属学及工艺—热处理]