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在叶轮机设计的流线曲率法反问题中,统一了基于圆柱坐标系下流面角γ,λ的和流线准法线上流面角的两种叶片力分解方法,得到了适合于轴流、斜流和离心压气机的动量主控方程.提出一种双涵道叶轮机的一体化通流反问题方法,采用分流机匣变位或者涵道比变化这两种自动调整措施.将流线曲率法应用于双涵道叶轮机加以组合压气机的一体化通流设计.设计了某双涵道、双转子、轴流离心组合的压缩系统,用计算流体动力学(CFD)方法检验了可行性和适应性.讨论了轴向速度比的物理意义及在通道自动调整的轴流级通流设计中的应用,给出相应设计算例.
In the inverse problem of streamline curvature method of turbine design, two kinds of blade force decomposition methods based on the stream face angle γ, λ and streamline quasi-normal upper surface angle are unified, And the governing equations of momentum of centrifugal and centrifugal compressors.This paper presents an integrated flow reversal method for dual-ducted turbines using two automatic adjustment measures such as diversion casing displacement or change of bypass ratio, The curvature method is applied to the integrated flow design of the combined compressor of a two-bypass turbine.The compression system of a dual-ducted, dual-rotor and axial centrifugal combination is designed and tested by the computational fluid dynamics (CFD) method The paper discusses the physical meaning of axial velocity ratio and its application in axial flow-through design with automatic adjustment of passage, and gives the corresponding design examples.