S型射流缝对静子叶栅流场结构的影响  

Effects of S-type slot on flow structure of stator cascade

作　　者：刘鹏程 张国臣 徐志晖 孙丹 张成烽 曹志远[2] LIU Pengcheng;ZHANG Guochen;XU Zhihui;SUN Dan;ZHANG Chenfeng;CAO Zhiyuan(Key Laboratory of Advanced Measurement and Test Technique for Aviation Propulsion System,Liaoning Province,School of Aero-engine,Shenyang Aerospace University,Shenyang 110136,China;School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]沈阳航空航天大学航空发动机学院辽宁省航空推进系统先进测试技术重点实验室,沈阳110136 [2]西北工业大学动力与能源学院,西安710072

出　　处：《流体机械》2022年第10期30-37,共8页Fluid Machinery

基　　金：辽宁省教育厅基金一般项目(JYT2020068);翼型、叶栅空气动力学重点实验室基金项目(614220121050125)。

摘　　要：为了改善静子叶栅流场性能,设计了一种S型射流缝叶栅。通过对其不同进气攻角、来流马赫数下的流场进行数值模拟,并将其与带有直线型射流缝的叶栅和原型叶栅进行对比,结果表明:0°和-5°攻角时,叶栅开缝总压损失略微增大,但S型射流缝叶栅增大的损失较小,优于直线型射流缝叶栅;在15°攻角时,叶栅开缝射流能较大幅度减小总压损失,降低吸力面附面层厚度,抑制附面层分离,增加叶栅气流流通能力,改善流场结构,在射流缝入口马赫数相同时,S型射流缝出口气流马赫数相较直线型射流缝出口提高了45%,对角区分离改善情况更好,S型射流缝叶栅对流动情况的改善程度依然优于直线型射流缝叶栅。S型射流缝叶栅是一种优于直线型射流缝叶栅的射流缝结构。In order to improve flow performance of stator cascade,a S-type slot cascade was designed. Numerical simulations of the flow field under different incidence angles and different inlet Mach number were carried out.The results show that total pressure loss of the cascade with slot increases slightly at 0° and-5° incidence angle,but the loss of S-type slot cascade is less than that of parallel slot cascade;at 15° incidence angle,the slotted cascade jet can greatly reduce total pressure loss,reduce the thickness of suction surface boundary layer,suppress the boundary layer separation,increase the flow capacity of cascade,improve the structure of flow field.The outlet Mach number of S-type slot is 45% higher than that of parallel slot when the inlet Mach number of jet slots are the same,the separation in corner region is better,and the degree of improvement of S-type slot cascade is still better than that of parallel slot.S-type slot cascade is a jet slot structure better than that of parallel slot cascade.

关 键 词：S型射流缝 平面叶栅 叶栅射流 流场结构 数值模拟 

分 类 号：TH12[机械工程—机械设计及理论] V231.3[航空宇航科学与技术—航空宇航推进理论与工程]