轴流压气机非轴对称机匣造型的研究  

NONAXISYMMETRIC CASING ON AXIAL-FLOW COMPRESSORS

作　　者：卢家玲[1] 楚武利[1] 刘志伟[1] 吴艳辉[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《工程热物理学报》2009年第2期209-213,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50506026)

摘　　要：首次对一尖部失速型的亚音轴流压气机转子进行了非轴对称机匣造型的设计和研究。本文首先分析了压气机非轴对称机匣造型与已有的非轴对称端壁造型概念的异同点,进而对本文研究的转子给出了非轴对称机匣造型的实例,对流场进行了定常与非定常的数值模拟,着重研究了非轴对称造型机匣对转子整体性能和稳定裕度的影响,对造型面对叶顶流动的改变进行了动态的分析,总结了该类机匣设计的初步经验。通过对同转子上非轴对称机匣造型与实壁机匣,周向槽和轴向槽机匣的对比,可以得出结论:精细设计的非轴对称机匣有效利用了叶顶局部压差,以及造型面的流线化,实现了对叶顶流动的优化,在不损失压气机整体性能的条件下实现了一定程度的扩稳。其应用前景值得关注和深入的研究。A nonaxisymmetric casing was designed and studied on one tip critical subsonic compressor rotor. Both steady and unsteady CFD simulations are conducted for investigating its impact to rotor performance and stall margin. The unsteady interaction between the nonaxisymmetric casing and the main flow was presented. Preliminary design principle of nonaxisymmetric casing on subsonic axial compressor is summarized. For compressor rotor being studied, the performance of the nonaxisymmetric casing was compared with the circumferential grooved casing, and the slotted casing. Result shows, due to its effectively utilizing of the local favorable pressure gradient, and its smooth contour, the nonaxisymmetric casing can improve the rotor stall margin without sacrifice its performance. The potential of using nonaxisymmetric casing to improve compressor performance deserves more research in the future.

关 键 词：非轴对称机匣造型 周向槽 轴向槽 失速 数值模拟 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程] V263.1