Computation for Optimal Velocity Distribution of 2-D Diffusers Using Genetic Algorithm

Fan Huiyuan, Wang Shangjin, Xi Guang
(Xi'an Jiaotong University)

Abstract: In this paper a genetic algorithm is used to compute the optimal velocity distri bution of a turbomachinery 2-D diffuser. Using this new approach, the expected optimal surface velocity distribution of 2-D diffuser can be very accurately searched, which on one hand, can make the velocity value minimized at the diffuser's outlet, and, in the same, guarantee the continuation of flow in the boundary layer. The approach is demonstrated with a 2-D diffuser which has the same flow conditions with that in the famous Stratford's experiment. The obtained result shows a good consistency with Stratford's experiment.
Keywords: turbomachinery diffuser, optimization design, genetic algorithm.