【作者】 李孝检； 赵祎佳； 赵明； 刘正先；

【Author】 Li Xiaojian;Zhao Yijia;Zhao Ming;Liu Zhengxian;Department of Mechanics, Tianjin University;

【机构】 天津大学力学系；

【摘要】 航空发动机、燃气轮机、化工能源压缩机及车船涡轮增压器等以流体为介质的旋转动力装置,随着对高转速、高气动性能、紧凑结构的追求,其中的离心压气机可行设计空间急剧减小。本文基于经典气动热力学关系推导了任意预旋进气条件下大流量离心压气机气动/结构参数的普遍关系式,研究了预旋进气对压气机流通能力、功系数及进口几何尺寸的影响规律。基于普遍关系式绘制了设计空间图谱,分析了设计参数的耦合制约规律及物理设计边界。从理论上挖掘了压气机流动、气动及结构参数的普遍关系,探索了可行设计边界的物理制约机制,得到了设计参数间的耦合变化规律。研究结果可为压气机优化设计提供理论指导。更多还原

【Abstract】 The overall development trend of aero-engines, gas turbines, industrial compressors, and turbochargers for vehicles and vessels is to strive for high speed, high aerodynamic performance and compact products. As a result, the feasible design space of centrifugal compressors in those power plants is drastically reduced. Based on the classical aerothermodynamic theories, some universal expressions between the aerodynamic/geometric parameters of high flow capacity centrifugal compressors under prewhirl are derived. The influences of prewhirl on the flow capacity, work coefficient and inlet geometry of the compressor are studied. Some design maps are derived from those universal correlations, and the coupling constraints and physical boundaries of the design parameters are analyzed. Overall, the general relationships among flow, aerodynamic and geometric parameters are theoretically explored. The physical mechanisms of design boundaries are clarified, and the coupling variations between design parameters are obtained. The research results can guide the design and optimization of centrifugal compressors.更多还原