在涡轮叶片层板冷却通道的冲击靶面布置微肋是一种有效的冷却手段。为研究W肋对冲击冷却的强化作用，本文采用数值模拟研究冲击雷诺数Re在4000至10000范围内以光滑靶面为基准，研究肋的宽度（W=0.05d，0.1d，0.2d，0.4d），高度（H=0.1d，0.3d，0.4d，0.8d）和夹角（α=90°，120°，150°，180°）的影响。结果表明，随H增加，换热总量和阻力都整体增加，综合换热效果在H=0.3d时最佳。换热量随着W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肋的综合换热效果最好，相比于光滑靶面换热量可提升28.5%-33.5%。

Arranging micro-ribs on the impact target surface of the cooling channel of the turbine blade laminates is an effective means of cooling. In order to investigate the strengthening effect of W-rib on impingement cooling, this paper uses numerical simulation to study the impingement reynolds number Re in the range of 4000 to 10000, the rib width (W=0.05d, 0.1d, 0.2d, 0.4d), height (H=0.1d, 0.3d, 0.4d, 0.8d), and the angle (α=90°, 120°, 150°,180°) of the rib, and the study is carried out with the smooth target surface as benchmarks. The results show that with the increase of H, both the total heat transfer and the resistance increase as a whole, and the comprehensive thermal performance is the best when H=0.3d. The amount of heat transfer first increases and then decreases with increasing W, and is maximum at W=0.1d. As α increases, the resistance first increases and then decreases, and the comprehensive thermal performance gradually decreases, with the best comprehensive thermal performance at α=90° and the maximum total heat transfer at α=120°. As a whole, the comprehensive thermal performance of the W-rib with W=0.1d , H=0.3d and α=90° added is the best, and the heat transfer capacity can be improved by 28.5%-33.5% compared with that of the smooth target surface.

TK124? ???

中央高校基础研究基金(3072022QBZ0308)