Open AccessInvestigation on the Effect of Impeller Design Parameters on Performance of a Low Specific Speed Centrifugal Pump Using Taguchi Optimization Method
Author(s) -
Hadi Ayremlouzadeh,
Samad Jafarmadar,
Seyed Reza Amini Niaki
Publication year - 2022
Publication title -
international journal of fluid power
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 27
eISSN - 2332-1180
pISSN - 1439-9776
DOI - 10.13052/ijfp1439-9776.2322
Subject(s) - impeller , taguchi methods , centrifugal pump , orthogonal array , power (physics) , maximum power principle , design of experiments , computational fluid dynamics , materials science , rake angle , mechanics , mechanical engineering , engineering , mathematics , machining , statistics , physics , composite material , quantum mechanics
In order to investigate the effect of blade design on pump performance, a CFD analysis was carried out, and the results were compared with experimental performance data of a low specific speed radial pump, which presents a good agreement. After model verification, the effect of impeller geometrical parameters includes blade outlet angle, wrap angle, and width at the exit, was investigated on the pump’s performance. Moreover, these parameters were chosen on three levels using an L9 orthogonal standard array of the Taguchi optimization method. The efficient levels of variables were calculated using the analysis of variance (ANOVA) method. The results revealed that impeller width at exit and blade outlet angle is the most effective pump shaft power and efficiency parameters. To minimize power, the optimal levels are the outlet angle of 27∘∘, wrap angle of 150∘∘, and width at the exit of 9 mm. Further, an outlet angle of 23∘∘, a wrap angle of 155∘∘, and a width at the exit of 9 mm lead to maximum pump efficiency. According to the validation simulations, an increase of 2.4% inefficiency and a minimum power of 3.9KW were achieved. The Overall Evaluation Criteria (OEC) technique revealed that considering 23∘∘, 160∘∘, and 9 mm for outlet angle, wrap angle, and width at the exit, minimum shaft power, and maximum pump efficiency will be achieved. ANOVA introduced width at the exit as the most governing parameter of pump performance characteristics.