摘要
为研究W型肋对冲击冷却的强化作用,采用数值模拟方法以光滑靶面为基准,研究冲击雷诺数Re在4000~10000范围内肋的宽度、高度和夹角对换热靶面的影响。所研究的肋宽W为0.05d,0.1d,0.2d,0.4d,高度H为0.1d,0.3d,0.4d,0.8d,夹角α为90°,120°,150°,180°。结果表明,随肋高度增加,换热总量和阻力整体增加,综合换热效果在H=0.3d时最佳。换热量随着肋宽度增大先增大后减小,在W=0.1d时最大;随着α增加,阻力先增大后减小,综合换热效果逐渐下降,α=90°时的综合换热效果最好,α=120°时总换热量最大;从整体而言,添加W=0.1d,H=0.3d及α=90°的W型肋的综合换热效果最好,换热量相比于光滑靶面可提升28.5%~33.5%。
In order to investigate the strengthening effect of W-shaped ribs on impingement cooling,this paper studied the effect of rib width,height and angle on the heat transfer target surface when the impingement Reynolds number Re is in the range of 4000-10000 based on the smooth target surface by using the numerical simulation method.The studied rib width W is 0.05d,0.1d,0.2d,0.4d,height H is 0.1d,0.3d,0.4d,0.8d and angleαis 90°,120°,150°,180°.The results show that with the increase of rib height,the total heat transfer and the resistance increase as a whole,and the comprehensive thermal performance is the best at H=0.3d.The amount of heat transfer first increases and then decreases with increasing rib width,reaching a maximum at W=0.1d.As the angle increases,the resistance first increases and then decreases,and the comprehensive thermal performance gradually decreases,with the best comprehensive thermal performance atα=90°and the maximum total heat transfer atα=120°.As a whole,the comprehensive thermal performance of the W-shaped rib is the best at W=0.1d,H=0.3d andα=90°.And the heat transfer capacity can be improved by 28.5%-33.5%compared with that of the smooth target surface.
作者
栾佳铭
符昊
张华庆
栾一刚
LUAN Jiaming;FU Hao;ZHANG Huaqing;LUAN Yigang(College of Power and Energy Engineering,Harbin Engineering University,Harbin,China,Post Code:150001;No.703 Research Institute of CSSC,Harbin,China,Post Code:150078)
出处
《热能动力工程》
CAS
CSCD
北大核心
2024年第11期63-73,共11页
Journal of Engineering for Thermal Energy and Power
基金
中央高校基础研究基金(3072022QBZ0308)。
关键词
冲击冷却
燃气轮机
涡轮叶片
冲击雷诺数
W型肋
impingement cooling
gas turbine
turbine blade
impingement Reynolds number
Wshaped rib
