Characterization of a Commercial Axial Flow PAT Through a Structured Methodology Step-by-Step


  • Diego Penagos-Vásquez Faculty of Engineering, Department of Mechatronics and Electromechanics, Research group – MATyER, Instituto Tecnológico Metropolitano, 050034 Medellín, Colombia
  • Jonathan Graciano-Uribe Faculty of Engineering, Department of Mechatronics and Electromechanics, Research group – MATyER, Instituto Tecnológico Metropolitano, 050034 Medellín, Colombia
  • Edward Torres Department of Mechanical Engineering, Research Group – GEA, Universidad de Antioquia, 050010 Medellín, Colombia



PAT, Best efficiency point, Control volume, Axial flow, Site conditions, Structured methodology


A centrifugal pump as a turbine (PAT) is the inverse operation of a conventional pump, which takes advantage of the hydraulic energy of water to convert it into rotational mechanical energy and subsequently into electrical energy, through a generator. The CFD analysis allows predicting the fluid dynamic behavior and calculating the operating characteristic curve of the PAT, thus reducing costs in experimental setups. In the literature, the operation of the turbomachine in pump and turbine mode is evidenced. However, there is no methodology applied in commercial axial flow pumps that exposes a structured step-by-step to carry out the numerical and fluid dynamic analysis. In this study, a novel structured methodology is developed describing the numerical and CFD analysis of a commercial axial flow centrifugal pump, which allows validating the characteristic curve in pump mode and then obtaining the site conditions in turbine mode, for its application in small hydroelectric power plants. As a result, in pump mode, an error of less than 8% is obtained between the manufacturer's curve and the numerical curve. In turbine mode, the best performance is around 73%. The aim is to propose a replicable algorithm in future works that allows the proper analysis in commercial axial flow pumps.  

Author Biographies

Diego Penagos-Vásquez, Faculty of Engineering, Department of Mechatronics and Electromechanics, Research group – MATyER, Instituto Tecnológico Metropolitano, 050034 Medellín, Colombia

Jonathan Graciano-Uribe, Faculty of Engineering, Department of Mechatronics and Electromechanics, Research group – MATyER, Instituto Tecnológico Metropolitano, 050034 Medellín, Colombia

Edward Torres, Department of Mechanical Engineering, Research Group – GEA, Universidad de Antioquia, 050010 Medellín, Colombia


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How to Cite

Diego Penagos-Vásquez, Jonathan Graciano-Uribe, & Edward Torres. (2022). Characterization of a Commercial Axial Flow PAT Through a Structured Methodology Step-by-Step . CFD Letters, 14(1), 1–19.