Optimal design for submerged siphon rectifying device based on hybird optimization strategy

A hybrid optimization aiming at decreasing the head loss and increasing the velocity uniformity strategy was proposed to improve the performance of the rectifier. First, the single inner flow passage structure was optimized by particle swarm optimization (PSO), and then orthogonal test was using to optimized the structure of rectifier based on PSO's results. The results show that head loss of inner flow passage is decreasing to 0.170 6 mm, and number of vortices and reflux phenomena at diffusive section are obviously reduced. The head loss is reduced to 1.572 4 mm by optimal structure scheme of rectifier. The primary and secondary analysis shows that the significant factor affecting head loss is the distribution pattern of the inner flow passage. And velocity uniformity is increasing to 90.2% when rectifier takes the Laws distribution pattern. So the hybrid optimization strategy can be considered as an effective way to improve the performance of submersible rectifier. © 2019, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.