摘要
对CDA环形叶栅和6种不同叶展高度安装吸力面翼刀的叶栅三维黏性流场进行了数值模拟，结果表明：各翼刀方案的叶展中部流动状况均较原型叶栅有一定改善，叶栅能量损失系数随翼刀安装位置沿叶展高度的增加先降低后增加。在计算范围内，翼刀安装在叶展高度为20％叶高的方案可使分离线高度显著降低。翼刀涡的形成、发展和变化受翼刀一端壁间气流流动情况和翼刀安装高度的影响，翼刀涡与通道涡的相互作用因翼刀安装高度而异。
The numerical simulation has been carried out to investigate the effect of suction surface fences on the flow fields in an annual CDA（controlled diffusion airfoils） compressor cascade. The results show that the flow near the middle of blade height with fences is better than that without fences; the cascade loss is reduced firstly and then increased along blade height. The position of the separation line in the cascade with at fence 20% blade height is reduced obviously. The fence vortices are related to the flow between fence and endwall, and the suction surface fence＇s height on the blade surface. The interaction between fence vortex and passage vortex is different with the fence location height along blade.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第6期938-942,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50076009
No.50746041)
关键词
压气机叶栅
吸力面翼刀
二次流
分离线
叶栅损失
compressor cascade
suction surface fence
secondary flow
separated line
cascade loss
