Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades
Mixed-flow pumps compromise large flow rate and high head in fluid transferring. Long-axis mixed-flow pumps with radial–axial “spacing” guide vanes are usually installed deeply under water and suffer strong cavitation due to strong environmental pressure drops. In this...
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doaj-6f228c86f7704bed92f81f8b1b9bb60b2020-11-24T22:53:41ZengMDPI AGSymmetry2073-89942019-01-011114610.3390/sym11010046sym11010046Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller BladesDi Zhu0Ran Tao1Ruofu Xiao2Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, China Agricultural University, Beijing 100083, ChinaDepartment of Energy and Power Engineering, Tsinghua University, Beijing 100084, ChinaBeijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, China Agricultural University, Beijing 100083, ChinaMixed-flow pumps compromise large flow rate and high head in fluid transferring. Long-axis mixed-flow pumps with radial–axial “spacing” guide vanes are usually installed deeply under water and suffer strong cavitation due to strong environmental pressure drops. In this case, a strategy combining the Diffusion-Angle Integral Design method, the Genetic Algorithm, and the Computational Fluid Dynamics method was used for optimizing the mixed-flow pump impeller. The Diffusion-Angle Integral Design method was used to parameterize the leading-edge geometry. The Genetic Algorithm was used to search for the optimal sample. The Computational Fluid Dynamics method was used for predicting the cavitation performance and head–efficiency performance of all the samples. The optimization designs quickly converged and got an optimal sample. This had an increased value for the minimum pressure coefficient, especially under off-design conditions. The sudden pressure drop around the leading-edge was weakened. The cavitation performance within the 0.5–1.2 Qd flow rate range, especially within the 0.62–0.78 Qd and 1.08–1.20 Qd ranges, was improved. The head and hydraulic efficiency was numerically checked without obvious change. This provided a good reference for optimizing the cavitation or other performances of bladed pumps.http://www.mdpi.com/2073-8994/11/1/46mixed-flow pumpcavitation inceptionleading-edge shapeoptimization design |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Di Zhu Ran Tao Ruofu Xiao |
spellingShingle |
Di Zhu Ran Tao Ruofu Xiao Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades Symmetry mixed-flow pump cavitation inception leading-edge shape optimization design |
author_facet |
Di Zhu Ran Tao Ruofu Xiao |
author_sort |
Di Zhu |
title |
Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades |
title_short |
Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades |
title_full |
Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades |
title_fullStr |
Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades |
title_full_unstemmed |
Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades |
title_sort |
anti-cavitation design of the symmetric leading-edge shape of mixed-flow pump impeller blades |
publisher |
MDPI AG |
series |
Symmetry |
issn |
2073-8994 |
publishDate |
2019-01-01 |
description |
Mixed-flow pumps compromise large flow rate and high head in fluid transferring. Long-axis mixed-flow pumps with radial–axial “spacing” guide vanes are usually installed deeply under water and suffer strong cavitation due to strong environmental pressure drops. In this case, a strategy combining the Diffusion-Angle Integral Design method, the Genetic Algorithm, and the Computational Fluid Dynamics method was used for optimizing the mixed-flow pump impeller. The Diffusion-Angle Integral Design method was used to parameterize the leading-edge geometry. The Genetic Algorithm was used to search for the optimal sample. The Computational Fluid Dynamics method was used for predicting the cavitation performance and head–efficiency performance of all the samples. The optimization designs quickly converged and got an optimal sample. This had an increased value for the minimum pressure coefficient, especially under off-design conditions. The sudden pressure drop around the leading-edge was weakened. The cavitation performance within the 0.5–1.2 Qd flow rate range, especially within the 0.62–0.78 Qd and 1.08–1.20 Qd ranges, was improved. The head and hydraulic efficiency was numerically checked without obvious change. This provided a good reference for optimizing the cavitation or other performances of bladed pumps. |
topic |
mixed-flow pump cavitation inception leading-edge shape optimization design |
url |
http://www.mdpi.com/2073-8994/11/1/46 |
work_keys_str_mv |
AT dizhu anticavitationdesignofthesymmetricleadingedgeshapeofmixedflowpumpimpellerblades AT rantao anticavitationdesignofthesymmetricleadingedgeshapeofmixedflowpumpimpellerblades AT ruofuxiao anticavitationdesignofthesymmetricleadingedgeshapeofmixedflowpumpimpellerblades |
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