可调弯度进口导叶在对转压气机中的应用

利用NUMECA软件对对转压气机进口导叶不同弯度时进行流场模拟,得到了进口导叶不同弯度时的流场结构和性能参数.进口导叶正弯时,总增压比明显下降,稳定工作范围明显变小;进口导叶负弯时,随着弯度的增大,总增压比逐渐上升,堵塞点右移;进口导叶弯度为-15°时,稳定工作范围明显较大.结果表明:采用可调弯度进口导叶能够调节和改善对转压气机性能和流场结构,可调弯度进口导叶能够调节转子进气攻角,使其更接近设计攻角,从而改善压气机的性能.

Application of variable-camber inlet guide vanes in counter-rotating compressor

The flow of counter-rotating compressor was simulated by the NUMECA, and the flow structure and performance were obtained under different cambers of variable-camber inlet guide vanes (VIGVs). The total pressure ratio decreased and stability operating range became narrow when the camber of VIGV was positive. With the increasing camber of VIGVs, the total pressure ratio increased, and the point of blockage moved right-wards when the camber of VIGV was negative. The stability operating range was widest when the camber of VIGV was -15°. The results showed that it could adjust and improve the performance and flow structure of counter-rotating compressor by using VIGV. The reason is that the VIGVs could change incidence angle of rotors, and make incidence angle close to design incidence angle, thus improving the performance of compressor.