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针对某小型压气机高负荷轴流级大弯角静子,采用串列叶片技术进行了改型设计.串列静子三维造型引入适度正弯以获得前后叶片的最佳相对位置.通过全三维定常数值模拟得到了原型与串列改型在设计转速下不同工况点的气动性能.结果表明:串列改型静子削弱了原型静子尖部流动分离,级等熵效率提高近3.5%,串列前叶几乎承担了全工况内绝大部分攻角变化,稳定裕度提升2%;改型后的静子可以更为均匀地分配前后叶片的载荷,有利于叶片附面层流动的控制.
Aiming at the high-load axial-flow large-angle static stator of a small compressor, the tandem blade technology was used to retrofit the model.The tandem stator three-dimensional modeling was introduced into a proper positive bending to obtain the optimal relative position of the front and rear blades.By the three-dimensional constant value The aerodynamic performance of the prototyping and tandem modification at different working conditions at design speed was simulated.The results show that the tandem modified stator weakens the flow separation at the prototype stator tip and the level isentropic efficiency increases by nearly 3.5% The leaf almost assumes the most angle of attack change in the whole working condition, and the stability margin is increased by 2%. The modified stator can distribute the load of the front and rear leaves more evenly, which is in favor of the flow control of the leaf lamina.