|
|
|
| Response surface method-based optimization of impeller of fluoroplastic two-phase flow centrifugal pump |
| ZHANG Desheng*,MEI Jian,ZHAO Ruijie,HUANG Jun,JIN Yongxin |
| National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
|
|
|
|
Abstract Steady two-phase flow in a fluoroplastic two-phase flow centrifugal pump was simulated based on discrete particle model,and the erosion rate in the impeller was predicted by using the Finnie erosion model for abrasive solid particles and the flow filed variables obtained to improve the pump efficiency and reduce the impeller erosion rate.Response surface method was used to establish mathematical models of objective functions in terms of impeller geometric parameters, including blade wrap angle φ, impeller inlet diameter D1, blade inlet angle β1, blade outlet angle β2, impeller outlet diameter D2, and blade outlet width b2. The three-dimensional response surfaces of various objective functions were plotted as a function of the six geometrical parameters in Matlab. Further, these mathematical models were unified in Matlab, and the impeller geometrical parameters of a fluoroplastic two-phase flow centrifugal pump of model SJB400-250-300 were optimized. Finally, the optimal combination of these parameters was obtained.The results show that there are interactions among these parameters. When D1, φ, β1, β2 and b2 are subject to the high levels and D2 is at the low level, the pump can achieve a better comprehensive performance. Compared with the original model, the pump efficiency is increased by 8.98%, and the erosion rate is decreased by 6.64%.By analyzing and summarizing the interactions between the parameters and the multiply objective functions, the influence of the interactions on the objective functions is obtained.These outcomes provide a reliable basis for the optimization design of fluoroplastic two-phase flow centrifugal pumps.
|
|
Received: 02 April 2019
|
|
|
|
|
|
|
