风扇通流设计中环量分布形式的探讨  

EFFECT OF SWIRL DISTRIBUTION ON FAN THROUGHFLOW DESIGN

作　　者：吴宏[1] 李秋实[1] 宋亚慧[1] 周盛[1] 

机构地区：[1]北京航空航天大学航空发动机气动热力重点实验室,北京100083

出　　处：《工程热物理学报》2008年第1期43-45,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.10577002);北京航空航天大学博士生创新基金

摘　　要：本文以时间推进通流设计方法为工具,设计了两个压比3.0级别的风扇转子,探讨了环量轴向分布形式对设计的影响。两个设计采用不同的环量分布,一为环量沿轴向线性变化,另一为环量沿轴向按余弦曲线变化,三维粘性计算结果表明,在峰值效率点,后者压比、效率和流量都高于前者。后者叶尖形成预压缩效果更为显著的叶型,对激波有更好的控制,激波后分离区小,更适合用于高负荷风扇的设计。To explore the effect of swirl axial distribution on fan design, two fan rotors with high pressure ratio about 3.0 are designed using time-marching throughflow method. In throughflow design, swirl is prescribed according linear distribution along axial direction for one rotor, but cosine curve distribution for another rotor. 3D viscous analysis results show that the latter one has higher pressure ratio, efficiency and mass flow in peak efficiency point. Particularly the cosine curve distribution of swirl causes more pre-compression for the profiles of supersonic sections, which is of great benefit to weakening the intensity of shock wave and suppressing the flow separation after shock wave. The cosine type of swirl distribution along axial direction in throughflow design is more suitable for highly-loaded fan.

关 键 词：风扇 通流设计 环量分布 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]