进气条件对压气机中介机匣流场影响的试验研究  

Experimental Investigation of Inlet Conditions' Effect on Compressor Intermediate Casing Flow Field

作　　者：向宏辉[1,2] 张良[2] 陆庆飞[2] 叶巍[2] 赵桓[2] 任飞[2] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016 [2]中国燃气涡轮研究院,四川江油621703

出　　处：《燃气涡轮试验与研究》2011年第4期15-19,共5页Gas Turbine Experiment and Research

摘　　要：以某压气机中介机匣为试验研究对象,通过改变来流径向分布与马赫数,建立了评估中介机匣气动性能的进口约束条件。在同步测量轴向流路离散压力参数的基础上,分析了中介机匣内部流场对进气条件的稳态响应。研究结果表明:进气条件对中介机匣流动损失影响较大,与均匀进气相比,进气畸变会增大弯曲流道内部径向压力梯度,影响流道曲率与流向压力梯度对附面层的控制效果;支板尾流对通道主流的干扰导致下游平直流道上部区域流场恶化,而进气畸变会加剧支板尾迹的影响;随着进口马赫数的增大,中介机匣总压损失系数与总压畸变强度呈现出不同的增长趋势,其出口流场径向分布对马赫数变化的气动敏感性较高。Inlet constraint conditions for evaluating the aerodynamic performances of a compressor intermediate casing were established by means of varying the radial distributions of upstream flow and its Mach number. The steady response of the internal flow field of the intermediate casing to inlet conditions was analyzed in detail based on synchronous measuring pressure parameters at various positions of the annular pas- sage. The experimental results indicated that inlet conditions had a significant impact on the flow loss with- in the intermediate casing. Compared with inlet uniformity condition, inlet pressure distortion would in- crease the radial pressure gradient and affect boundary layer development controlled by streamline curvature and streamline pressure gradient. The interaction between struts wake and passage main-flow resulted in the downstream flow field deterioration in the upper regions of the straight passage. In addition, inlet distortion can enlarge the struts wake effect. As inlet Mach number increased, the total pressure loss coefficient and pressure distortion intensity of the intermediate casing increased in two different ways. It showed that the flow field radial distribution at exit of the straight passage was sensitive to inlet Mach number.

关 键 词：中介机匣 附面层 压力梯度 流道曲率 试验研究 

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]