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为了充分发挥主被动控制技术融合的复杂气动布局在高负荷压气机中的应用潜力,通过数值模拟的方式,设计了多台采用不同气动布局方式的单级高负荷压气机进行对比研究。研究结果表明,在静叶中融合应用三维叶片造型技术时,端弯叶片前缘所呈现的反弯形态会导致静叶损失增加,但端部气流角更好的匹配保证了压气机失速裕度的提高。在端弯叶片设计基础之上叠加应用正弯造型可以抵消由于端弯而导致的前缘反弯形态,并有效降低总压损失,进一步提高失速裕度。通过调节进口预旋,动叶的逆压梯度降低,效率得到较大幅度的提升。此时静叶将承担更多的静压升,可以通过叠加应用附面层抽吸技术来保证静叶的正常工作。在正弯曲造型的静叶栅中叠加应用仅在吸力面角区抽吸的主动流动控制结构,在负攻角的来流条件下,分离流动控制效果相对不明显。
In order to give full play to the potential application of complex aerodynamic layout with active-passive control technology in high-load compressors, several single-stage high-load compressors with different aerodynamic layouts were designed and compared by numerical simulation. The results show that when the three-dimensional blade modeling technology is applied to the stator blades, the anti-bending shape presented by the leading edge of the blade leads to the increase of the stator blades loss, but the better matching of the end airflow angles ensures the compressor stall margin Improve. The application of the positive curve shape on the basis of the curved blade design can counteract the anti-bending form of the leading edge due to the end bending and effectively reduce the total pressure loss so as to further improve the stall margin. By adjusting the pre-rotation of the inlet, the counter-pressure gradient of the moving blades is reduced and the efficiency is greatly improved. At this point the static leaves will take more static pressure rise, you can superimpose the application of top layer suction technology to ensure the normal work leaves. In the positive curved statically cascaded cascade, the active flow control structure sucked only in the suction angle is applied. Under the condition of the negative angle of attack, the flow control effect is relatively insignificant.