Comparative Analysis of Strength and Modal Characteristics of a Full Tubular Pump and an Axial Flow Pump Impellers Based on Fluid-Structure Interaction
TLDR
In this paper, the structural properties of full tubular and axial-flow pump impellers were investigated using fluid-structure interaction (FSI) to determine the structural mechanical characteristics of the pump impeller, which showed that as the flow rate increases, the total deformation and equivalent stress are significantly reduced.Abstract:
Fluid-structure interaction (FSI) was used to determine the structural mechanical characteristics of full tubular and axial-flow pumps. The results showed that as the flow rate increases, the total deformation and equivalent stress are significantly reduced. The max total deformation (MTD) and the max equivalent stress (MES) of the full tubular pump impeller occur on the outer edge of the blade. There are two stress concentrations in the full tubular pump impeller, one of which is located in the outlet area of the rim, and the other is located in the outlet area of the hub. However, the MES of the axial-flow pump appears in the center of the blade hub. The performance difference between the full tubular pump and the axial-flow pump is mainly caused by the clearance backflow. The natural frequency of the full tubular pump is lower than that of the axial-flow pump on the basis of the modal results. The MES of the full tubular pump is mainly concentrated at the junction of the blade and the motor rotor, and the max thickness of the rim is 6mm, which can be more prone to cracks and seriously affect the safety and stability of the pump.read more
Citations
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Hydro turbine failure mechanisms: An overview
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Multi-Disciplinary Optimization Design of Axial-Flow Pump Impellers Based on the Approximation Model
TL;DR: In this article, a multi-disciplinary optimization design method based on an approximation model was adopted to improve the comprehensive performance of axial-flow pump impellers and fully consider the interaction and mutual influences of the hydraulic and structural designs.
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Numerical simulation and experimental study on the comparison of the hydraulic characteristics of an axial-flow pump and a full tubular pump
TL;DR: In this article, an axial-flow pump impeller is designed on the basis of plane cascade theory, which is based on surface element method, to study the influence of impeller rotor on the hydraulic performance of a full tubular pump.