Optimization Design of Centrifugal Pump Auxiliary Blades Based on Orthogonal Experiment and Grey Correlation Analysis

In order to improve the hydraulic performance of multistage centrifugal pumps through utilization auxiliary blades, this paper presents an optimization these blades using orthogonal experiments and grey relational analysis. The scheme for blade structure resulted as follows: Z = 2, R 46.9 mm, W 2.5. vicinity optimal operating point, optimized showed a 6% increase in head compared original scheme. was not significant at low flow rates, but high exhibited substantial head, approximately 23% higher than Using L9(34) array, quantity (Z), inner diameter (R), width (W) were selected factors, each with three levels, design nine different impeller structures. An entire field numerical simulation five-stage pump conducted designs, obtaining under rated working conditions. Based on range analysis method experiment, derived, primary secondary factors affecting found be (W), (Z) blades. accuracy experimental results may have been influenced by factor level dimensions, verify results, top experiment. A prototype created according solution, which conditions presented total efficiency 32.6% 41.39 m, significantly without This combination is suitable pumps. approach can accurately infer effect geometric parameters their corresponding solutions.