离心压气机自循环预旋喷气机匣处理的设计和验证  

Investigation of self-recirculating casing treatment with preswirl blowing for centrifugal compressor

作　　者：康剑雄[1,2] 杜强[2] 黄国平[1] 朱俊强[2] 温殿忠[3] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]中国科学院工程热物理研究所轻型动力重点实验室,北京100190 [3]中国航空工业集团公司中国航空动力机械研究所,湖南株洲412002

出　　处：《航空动力学报》2012年第6期1297-1302,共6页Journal of Aerospace Power

基　　金：基础科研项目(B1320110070)

摘　　要：采用一种预旋喷气机匣处理提高离心压气机特定转速范围内的稳定裕度.通过引气加大离心叶轮进口基元级流量降低通道堵塞,并借助回流预旋喷气改变前缘攻角抑制叶背分离是该机匣处理扩稳的主要机理.基于这样的认识,对机匣处理做了几何参数设计研究,发现轴向搭接位置、搭接长度和开槽角度是影响机匣处理性能的3个主要参数.通过几何参数的合理选取,在尽量提高80%设计转速稳定裕度的同时兼顾100%设计转速的效率.压气机部件性能试验验证了该设计方法的有效性,并观测到在低转速时,机匣处理可以同时提高稳定裕度和效率.Numerical and experimental investigations have been conducted on a self-re ulating casing treatment for a centrifugal compressor. Stall margin improved due to redi- ing the low-momentum fluid to increase the mass flow in the impeller passage and decrea- ; the positive attack angle in the tip region with preswirl blowing. Based on the working ：hanism, parametric studies were conducted to design the casing treatment geometry. It found that the angle of the grooves, the position and the length of overlap were three parameters for the ＂best casing configuration＂ in terms of larger stall margin improvement and smaller lowering of efficiency according to the given range of rotating speeds. The effectiveness of this casing treatment was verified experiments, and it was observed that the stall m taneously at lower rotating speed. by argl the single stage centrifugal compressor n and efficiency can be improved simul-taneously at lower rotating speed.

关 键 词：机匣处理 预旋喷气 失速裕度 效率 离心压气机 

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]