%A ZHAO Honglei, WANG Songtao, HAN Wanjin, FENG Guotai %T Aerodynamic design by jointly applying S2 flow surface calculation and modern optimization methods on multistage axial turbine %0 Journal Article %D 2008 %J Front. Energy %J Frontiers in Energy %@ 2095-1701 %R 10.1007/s11708-008-0007-4 %P 93-98 %V 2 %N 1 %U {https://journal.hep.com.cn/fie/EN/10.1007/s11708-008-0007-4 %8 2008-03-05 %X A three-stage axial turbine was redesigned by jointly applying S2 flow surface direct problem calculation methods and multistage local optimization methods. A genetic algorithm and artificial neural network were jointly adopted during optimization. A three-dimensional viscosity Navier–Stokes equation solver was applied for flow computation. H-O-H-topology grid was adopted as computation grid, that is, an H-topology grid was adopted for inlet and outlet segment, whereas an O-topology grid was adopted for stator zone and rotor zone. Through the optimization design, the total efficiency increases 1.1%, thus indicating that the total performance is improved and the design objective is achieved.