摘要
为了深入了解空冷透平气膜冷却机理及三维流动特性,对某型燃气轮机透平静叶进行了详细的数值模拟。计算采用三维N-S方程有限体积解法,湍流模型为标准k-ε模型加改进的壁面函数方法,网格为非结构。计算域扩展到多排气膜冷却孔及与其相连的冷气通道内,求解亦包含所有冷却孔内部流动。根据计算结果重点对前缘气膜冷却复杂三维流动以及整个叶片的气膜冷却特性进行分析。
To understand the characteristics of 3D flow and film cooling mechanism in a film cooled turbine in depth, detailed numerical simulations are carried out for the stator of a gas turbine using a 3D NS finite volume solver incorporated with standard k-ε turbulence model and scalable wall function. Multi-row film cooling holes and the conjoint coolant-supply-plenum are constructed by means of unstructured meshes, and flows in all the holes are considered. Analysis of simulation results emphasizes on the complex 3D flow due to cooling near leading edge and blade cooling characteristics.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第3期405-408,共4页
Journal of Engineering Thermophysics
关键词
气膜冷却
传热
燃气透平
数值模拟
film cooling
heat transfer
gas turbine
numerical simulation
