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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 7897614, 9 pages
https://doi.org/10.1155/2017/7897614
Research Article

Numerical Investigation of the FSI Characteristics in a Tubular Pump

College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

Correspondence should be addressed to Shuo Wang; nc.ude.uhh@gnawqq

Received 18 January 2017; Revised 12 May 2017; Accepted 29 May 2017; Published 13 July 2017

Academic Editor: Haifei Liu

Copyright © 2017 Shuo Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Flow condition was simulated in a shaft tubular pump by using the Shear-Stress Transport (SST) - turbulence model with high quality structured grids in design condition. Corresponding structural vibration characteristics were then analyzed based on two-way coupled Fluid-Structure Interaction (FSI) method. Fluid results showed that flow in the outlet flow passage was a combination of the axial flow and circumferential rotation motion. Time and frequency domain analysis of pressure pulsation of typical measure points indicated that larger pulsation amplitudes appeared in the tip of the blades and the main vibration source was the pressure pulsation induced by rotation of the blades. The fluid pulsation amplitudes decreased gradually along the flow direction, which can be ascribed to the function of fixed guide vane. Structural analysis of the blades in both pressure and suction side indicated that significant stress concentration was formed at the blade and hub connection near the leading edge. Maximum effective stress of the blades varied periodically, so prevention measures of the fatigue of blades should be taken. This research can provide important reference for the design of the tubular pump.