【摘要】 根据导向叶片的曲面结构,运用SST湍流模型,对涡轮叶栅通道内部的三维流场和圆形气膜孔叶片型面的冷却效果进行了数值模拟,在设计工况下,分析气膜孔倾角的改变对吸力面冷却效果的影响.研究结果为:无论改变哪排气膜孔的倾角,前倾的冷却效果总是高于后倾;相比之下,第一排气膜孔的倾角发生变化后对冷却效果的影响最大.更多还原

【Abstract】 The film cooling characteristics on blade surface were numerically investigated using the two-equation turbulence model of the shear-stress transport.Three-dimensional turbulent flow in turbine cascade and the cooling effectiveness on blade surface were carried out under the same coolant total pressure.The influence of the cooling effectiveness of cylindrical film cooling holes on the blade suction surface with varying film hole inclination angles was investigated.Results show that the front inclination of the film cooling hole may improve the film cooling effectiveness for every row of film cooling holes,and the improvement is more obviously for the first row of film cooling holes.更多还原