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研究了弯叶片对压气机静叶根部泄漏流动的影响机理.对比分析了采用弯叶片后,根部间隙泄漏涡的运动轨迹、旋涡强度的差异以及对吸力面附面层发展的影响;从根部最大负荷位置以及逆压梯度等参数的变化,分析了造成泄漏流动变化的原因;从出口截面的轴向速度分布以及出口气流角沿叶高分布的变化,分析了静叶根部采用弯叶片后对流动匹配的影响.结果表明:正弯叶片使泄漏涡强度减弱,提高了下端壁的通流能力,改善了静叶出口气动参数的均匀性,减少了能量损失,尤其是使近端壁处轴向速度增大,有利于原型压气机根部的流动匹配.
The effect mechanism of the curved blade on the leakage flow of the stator blade root is studied.The movement trajectory and vortex intensity of the root clearance leakage vortex and the influence on the development of the suction surface coating layer are compared and analyzed after the curved blade is used.From the maximum Load position and back pressure gradient and so on. The reasons for the change of leakage flow were analyzed. The axial velocity distribution at outlet cross section and the change of outlet airflow angle along the blade height distribution were analyzed. The results show that the positive vane can weaken the leakage vortex strength, improve the flow capacity of the lower end wall, improve the uniformity of the aerodynamic parameters at the vane outlet and reduce the energy loss, especially in the axial direction at the proximal end wall Increased speed, is conducive to the flow of prototype compressor root match.