摘要
采用具有不同控制参数的积叠线对Rotor37转子叶片进行周向弯曲造型设计,获得叶片的最佳弯高和弯角。采用数值计算方法研究了叶片弯曲对压气机性能及其内部流动结构的影响,结果表明:弯曲叶片具有良好的变工况性能,新设计的叶片能有效提高压气机的绝热效率和总压比。叶片周向弯曲引起端部低能流体向主流区的迁移,使得端壁和主流区流动状态发生改变,在端壁区流动损失下降,而在主流区流动损失有所增加,同时沿叶高方向上流体的质量流量被重新分配。
The bowed blade has a great effect to improve the performance of axial flow compressor. The paper redesigns NASA rotor 37 through the stacking line with different control parameters and attains the optimal bowed angle and the optimal bowed height. The numerical simulation has been carried out to investigate the performance of the axial flow compressor and its internal flow structures. The results showed that the bowed blade has better performance. The efficiency and the total pressure ratio of the new blades are increased effectively at different flow conditions. The flow structures are changed in the end wall and in mainstream region, due to the blade is bowed in the circumferential direction. The low energy fluid centralizing in end-wall is transpor- ted to the middle span along the blade height. The flow loss is decreased in the end wall and is increased in the mainstream region. At the same time, the fluid flow mass is redistributed in the span wise.
出处
《流体机械》
CSCD
北大核心
2010年第2期13-17,共5页
Fluid Machinery
关键词
弯曲叶片
轴流压气机
数值模拟
bowed blade
axial flow compressor
numerical simulation
