期刊
KSME INTERNATIONAL JOURNAL
卷 14, 期 9, 页码 1005-1012出版社
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/BF03185803
关键词
numerical optimization; axial compressor; blade; thin-layer Navier-Stokes equations; stacking line
Numerical optimization techniques combined with a three-dimensional thin-layer Navier-Stokes solver are presented to find an optimum shape of a stator blade in an axial compressor through calculations of single stage rotor-stator flow. Governing differential equations are discretized using an explicit finite difference method and solved by a multi-stage Runge-Kutta scheme. Baldwin-Lomax model is chosen to describe turbulence. A spatially-varying time-step and an implicit residual smoothing are used to accelerate convergence. A steady mixing approach is used to pass information between stator and rotor blades. For numerical optimization, searching direction is found by the steepest decent and conjugate direction methods, and the golden section method is used to determine optimum moving distance along the searching direction. The object of present optimization is to maximize efficiency. An optimum stacking line is found to design a custom-tailored 3-dimensional blade for maximum efficiency with the ether parameters fixed.
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