摘要
针对某大折转角子午扩张型导叶,通过数值模拟,讨论了端壁附面层抽吸对叶栅性能的影响。结果表明:对于大分离叶栅,在靠近吸力面的端壁上进行附面层抽吸可以获得最佳效果。端壁抽吸可以改变流场的分离形态,遏止端壁角区的分离,并延迟和减小吸力面的分离。从而在大部分叶高上使得叶片负荷增加,损失减小,并且沿径向分布趋于均匀。
By using of numerical simulation, the effect of applying boundary layer suction on end-wall to the aerodynamic performance for a van with a high-turning angle and meridional divergence was discussed. The result showed that for the cascade with larger separation, perfect effects can be obtained by applying boundary layer suction on the end-wall near suction surface. The separation configuration of the flow field will be changed the comer will be restrained and also the separation on the suction surface by end-wall suction. The flow separation at will be delayed or depressed. Therefore the blade loading along the blade height will be enlarged. Furthermore the flow loss will be decreased and the flow field will be distributed uniformly along radial.
出处
《动力工程》
EI
CSCD
北大核心
2006年第6期795-798,共4页
Power Engineering
关键词
动力机械工程
叶轮机械
导叶
大折转角
抽吸
分离形态
负荷
power and mechanical engineering
turbo-machine
vane
high-turning angle
suction
separation configuration
loading
