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| DOI： |
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| Multi-parameter Optimizing the Impellers in Mixing-flow Pump |
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XU Yingli
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Zhejiang Tongji Vocational College of Science and Technology, Hangzhou 311231, China
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| Abstract: |
| Using the mixing-flow pump 392 as an example, and taking outlet width of the blade, dip angle of the back shroud, outlet angle of the blade as optimization variables, we analyzed the performance of mixing-flow pump using multi-parameter optimization and CFD simulation. The CFD model were verified by energy performance data. Three factors andthree levels were used to calculate the internal flow based on the Box-Behnken experiment. The predicted performance efficiency was fitted using the quadratic response-surface model. The objective function was solved using the genetic algorithm. The results showed that the most significant parameter was outlet angle of the blade, followed by dip angle of the back shroud, and that the efficiency of the pump decreased as the values of these two factors increased; in contrast, the outlet width of the blade had an insignificant effect on the efficiency. The two impeller blade parameters, β2 and b2, were larger than those of original model, while T2 remained unchanged. The optimization results showed that the hydraulic efficiency and the head of the model pump could be improved by 1.2% and 0.8%, respectively. |
| Key words: mixing-flow pump； blade parameters； Box-Behnken experiments； combined optimization |
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