大折转角弯曲静叶在高负荷压气机改型设计中的应用

Application of high-turning bowed compressor stator for redesign of a highly loaded fan stage

关键词:  压气机  大折转角+  弯曲静叶+  局部修型+

Key words:  Compressor  High-turning+  Bowed stator+  Local modification+

摘要:

采用适合高亚声速气流进口的弯曲静叶对某型高负荷风扇级进行改型设计,使用单列大折转角弯曲静叶代替原型级中的串列静叶。采用叶片三维成型技术设计弯曲静叶,引入叶片局部修型措施控制改善栅内流动和动静叶间的匹配,通过数值模拟三维流场得到原型级和改型级的不同转速特性线上各工况点的气动性能。研究结果表明,三维成型设计的高负荷弯曲静叶能够优化压气机的结构,满足高负荷压气机不同转速工作点高性能的要求,同时具有优良的变工况性能,是研发高性能压气机部件可采取的措施之一。

Abstract:

A redesign of a highly loaded fan stage using high-turning bowed compressor stator was studied.The original tandem stator was replaced by the highly loaded bowed stator which was applicable to highly subsonic flow conditions.3D contouring technique and local modification of blade were applied to the design of the bowed blade in order to improve the aerodynamic performance and the matching of the rotor and stator blade rows.Performance curves at different rotate speeds as well as performances at operating points for both the original fan stage and redesigned fan stage were obtained by numerical simulations.The results show that the highly loaded bowed stator can be used in improving the structure and the aerodynamic performances at various operating points of the compressor stage and it can also provide high performances at off-design conditions.It is believed that the highly loaded bowed stator can advance the design of high-performance compressor.