摘要
应用数值模拟的方法,研究了带横向槽的气膜孔冷却结构的槽深度变化对其平均冷却效率的影响规律。在吹风比分别为0.5,1.0,1.5和2.0的条件下,对深度分别为0.5D,0.75D,1.0D和不开槽的4种气膜冷却结构进行了数值模拟,得出了气膜孔出口开槽深度变化对平均冷却效率的影响规律。同时给出了吹风比为1.0时,气膜孔中心线温度场二维轮廓示意图及近壁面的冷却效果示意图,并分析了槽深度对平均冷却效率的影响机理。
This paper investigated the influence of different slot depths on the average cooling effectiveness of a cooling structure with transverse slot by numerical simulation. Four cases with slot depth of 0. 5 D ,0. 75 D, 1.0 D and standard cylindrical hole were studied under the condition of blowing ratio 0. 5, 1. 0, 1.5, and 2. 0. The influence law of slot depths on the average cooling effectiveness is determined. We also give out the picture of film hole centedine 2D temperature contours and the cooling effectiveness picture of near surface. Finally, the slot depth cooling mechanism was analyzed.
出处
《机械科学与技术》
CSCD
北大核心
2008年第9期1252-1255,1260,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(50276070)资助
关键词
气膜冷却
吹风比
横向槽
数值模拟
film cooling
blowing ratio
transverse slot
numerical simulation
