摘要
通过数值模拟的方法,研究了涡轮叶片弦中区所采用的新型双层腔冷却结构的冷却特性,系统分析了冲击与气膜组合冷却的流动与换热特性,讨论了冷气进口雷诺数Re、吹风比M以及进气方式对组合冷却效果的影响。计算参数范围是:冷气进口雷诺数Re=2000～5000,吹风比M=0.6～2.0。计算结果表明:冷气进口雷诺数、吹风比以及冷气的进气方式对组合冷却效果均有很大影响。(1)冷气进口雷诺数越高、吹风比越大,组合冷却效果越好。(2)反向进气时的组合冷却效果明显好于正向进气时的组合冷却效果。
The present study concentrates on the computational investigation of a new cooling con- figuration of a double-layer cavity in the middle section of modern turbine blade.A three-dimensional Navier-Stokes code with standard k-εturbulence model as well as with wall functions was used to compute the flow and heat transfer characteristics for a combined impingement and film cooling con- figuration.The blowing ratios are from 0.6 to 2.0,and the Reynolds number based on the inlet velocity of the cooling air and h...
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第7期1185-1188,共4页
Journal of Engineering Thermophysics
基金
新世纪优秀人才支持计划基金(No.NCET-05-0189)
关键词
冲击冷却
气膜冷却
换热
冷却效果
impinging cooling
film cooling
heat transfer
cooling effectiveness
