关键词: 压气机叶片;最优设计;网格生成

Abstract: For aerodynamic optimal design of compressor blade, Initial blade profile was modified using Hicks-Henne function. The two-dimensional compressor flow field was calculated using Navier-Stokes equation method. A hybrid genetic algorithm was used to search for the optimal blade. When the pressure distribution on blade surfaces was taken as objective, the corresponding blade profiles can be found effectively. When flow loss less and pressure rise large or loss minimum as pressure rise given was taken as objective, distributions of isentropic Mach number on the optimal blade suction surfaces were reasonable and consistent with that of controlled diffusion airfoils(CDA). To improve precision of numerical simulation and to apply conveniently algebraic turbulence model, a new kind of H-type grid generation method was proposed, by which the generated grid lines orthogonally intersect at blade surfaces. The grid was generated using geometrical method and then grid lines were smoothed by numerically solving ellipse equations.

Key words: Compressor blade;Optimal design;Grid generation