Shape Optimization of Swept, Leaned, and Skewed Blades in a Transonic Axial Compressor for Enhancing Rotor Efficiency

효율 향상을 위한 축류 압축기 동익의 스윕, 린, 스큐각의 형상 최적화

Shape optimization of a transonic axial compressor rotor operating at the design flow condition has been performed using response surface method and three-dimensional Navier-Stokes analysis. Three design variables of blade sweep. lean and skew are introduced to optimize the three-dimensional stacking line of the rotor blade. The object function of the shape optimization is selected as an adiabatic efficiency. Throughout the shape optimization of the rotor. the adiabatic efficiency is increased by reducing the tub comer and tip losses. Separation line due to the interference between a passage shock and surface boundary layer on the blade suction surface is moved downstream for the optimized blade compared to the reference one.