摘要
为探讨旋转状态下气膜冷却的效果,在不同吹风比和旋转数下,对带有气膜冷却的涡轮叶片进行三维数值模拟,研究了旋转效应对叶片表面冷却效率的影响。结果表明,当叶片旋转时,压力面上的冷却效率增大,吸力面上的冷却效率降低。叶片表面气膜冷却效果随着旋转数的增加而下降。旋转效应对叶片表面冷却效果的影响程度依赖于吹风比。当吹风比增大时,气膜冷却效果随着旋转数的增加而下降的趋势增大。
The flowfield of the turbine blade with film cooling were investigated numerically,calculations of stationary blade cascades and moving blades were carried out under different blowing rate and rotational speed conditions.The influence of rotation effect on film cooling was analyzed.Results show the cooling effectiveness on the pressure surface increases when the turbine blade rotates;on the contrary,the cooling effectiveness on the suction surface reduces,and it decreases with the increment of the rotational number.The influence degree of the rotation effect on the cooling effectiveness of the blade surface is dependent on the blowing rate.When the blowing ratio is increased,the degree of the reduction of the cooling effectiveness increases with the increment of the rotational number.
出处
《航空计算技术》
2011年第6期1-4,共4页
Aeronautical Computing Technique
基金
国家自然科学基金项目资助(50906071)
西北工业大学基础研究基金项目资助(JC201011)
西北工业大学翱翔之星项目资助
关键词
旋转效应
吹风比
气膜冷却效果
压力面
吸力面
rotation effect
blowing rate
film cooling effectiveness
pressure surface
suction surface
