Design of mixed flow pump and its numerical and parametric analysis using computational fluid dynamics

Document Type : Original Article

Authors

1 Mechanics Faculty, Malek-Ashtar university of Technology

2 Mechanics Faculty. Malek-Ashtar university of technology

3 Mechanics Faculty, Malek-Ashtar University of Technology

Abstract

In this article, a mixed flow pump was designed using CFturbo software and analyzed during stable and transient process using CFX software. For the accuracy of the results of numerical analysis, a validation was done, and the numerical results were in good agreement with the experimental results. During the transient process in the numerical analysis, an instantaneous maximum pressure was observed. Pump head changes in this case are divided into three steps. In the first step, the head increases linearly, then in the second step, a momentary maximum pressure occurs, in the last step, the head curve tends to be stable. In addition, a parametric study was carried out in steady and transient mode, which includes the investigation of the effect of changing the blade outlet angle in four different angles in steady mode and two angles in transient mode, as well as the effect of changing the pump speed on its performance. By changing the speed of the pump impeller, the head and efficiency also increase or decrease in proportion to the increase or decrease of the speed. By changing the blade outlet angle, it was observed that with the increase of the outlet angle, the efficiency first increases and then decreases after the angle of 26 degrees, also the pump head increased by about 23 percent.

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https://creativecommons.org/licenses/by/4.0/

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History

  • Receive Date: 16 October 2023
  • Revise Date: 22 December 2023
  • Accept Date: 30 January 2024
  • Publish Date: 19 February 2024

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