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Design Procedure of an Axial Flow Irrigation Pump
Author(s)
Date Issued
January 1, 2025
Type
Article
Abstract
The paper presents the design procedure of an axial flow irrigation pump. It was designed to deliver a flow rate of 9,000 L/min with a head of 4 m at the Best Efficiency Performance point (BEP). The target hydraulic efficiency was 75%. It started with the preliminary design which predefined the inlet and outlet blade angle of the impeller and the stator vane using a triangular velocity diagram. After that, the other components in the pump system which are the inlet bell, duct, and trailing cone were constructed in the Computer Aided-Design (CAD) software. Then, the flow structure of the pump system was obtained using Computational Fluid Dynamics (CFD). The impeller blade channel, guide vane profile, and the flow channel throughout the pump system were improved to attain target efficiency. This was done by awareness of the development of high velocity (jet flow) and low velocity wake (wake flow) along the entire flow channel. The blade profile was adjusted to minimize wake region while the high jet velocity was reduced. By continuously improving the blade profile, the final version’s hydraulic efficiency was 75.27%. The head was 5.68 m with the flow rate of 11,676 L/min.
Citation
Journal of Research and Applications in Mechanical Engineering, 13(1), 2025