The volute tongue has a great influence on the rotational impeller and stationary volute interaction in a pump. In this paper, the impact of tongue shapes on hydraulic and structural performances of a double channel pump with a specific speed of 110.9 is investigated, and four cases with different tongue shapes are simulated by the two-way coupling fluid-structure interaction (FSI) method. The result shows that, in the hydraulic performance aspect, the influence of tongue shapes on the efficiency is weak, and the maximum different value is 0.76%. But the maximum different value of pump-head is 0.126m. Tongue shapes mainly affect the pressure fluctuation in and after the tongue edge in the rotational direction. Pressure fluctuation near the rectangle tongue is stronger than that near the rounded tongue, and an appropriate increase of the corner radius will decrease the pressure fluctuation effectively. Because of the asymmetry of the volute, radial force on the volute is very large. It is periodical when the impeller rotates one circle and decreases obviously with an appropriate increase of the corner radius. Compared to the rounded tongue, the radial force on the volute with rectangle tongue is larger. In structural performance aspect, stress concentration of the impeller appears on the suction surface near the outlet, and the volute stress concentration appears near the tongue edge. Tongue shapes have little effect on the stress distribution of the impeller, but affect the volute stress deeply. The maximum stress near the rectangle tongue is a little larger than that near the rounded tongue, but an appropriate increase of the corner radius will decrease the maximum stress of volute obviously, and the amplitude will decrease slightly. Displacement with the magnitude 10−5 m happens in the pump, and the maximum displacement point appears in the outlet of the volute. It is periodical and mainly influenced by the blade-passing frequency. The tongue shape has little impact on the maximum displacement, but it has an obvious effect on the vibration velocity of the pump. Compared to the volute with rectangle tongue, the rounded tongue can decrease the vibration velocity, and larger corner radius can also suppress the vibration.
Skip Nav Destination
ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
July 26–31, 2015
Seoul, South Korea
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5721-2
PROCEEDINGS PAPER
Impact of Tongue Shapes on Hydraulic and Structure Performances of Double-Channel Pump Based on Fluid-Structure Interaction Available to Purchase
Binjuan Zhao,
Binjuan Zhao
Jiangsu University, Zhenjiang, China
Search for other works by this author on:
Huilong Chen,
Huilong Chen
Jiangsu University, Zhenjiang, China
Search for other works by this author on:
Youfei Zhao
Youfei Zhao
Jiangsu University, Zhenjiang, China
Search for other works by this author on:
Binjuan Zhao
Jiangsu University, Zhenjiang, China
Jing Qiu
Jiangsu University, Zhenjiang, China
Huilong Chen
Jiangsu University, Zhenjiang, China
Yu Wang
Jiangsu University, Zhenjiang, China
Youfei Zhao
Jiangsu University, Zhenjiang, China
Paper No:
AJKFluids2015-2774, V001T02A004; 9 pages
Published Online:
November 20, 2015
Citation
Zhao, B, Qiu, J, Chen, H, Wang, Y, & Zhao, Y. "Impact of Tongue Shapes on Hydraulic and Structure Performances of Double-Channel Pump Based on Fluid-Structure Interaction." Proceedings of the ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. Volume 1: Symposia. Seoul, South Korea. July 26–31, 2015. V001T02A004. ASME. https://doi.org/10.1115/AJKFluids2015-2774
Download citation file:
14
Views
Related Proceedings Papers
Related Articles
On the Mechanism of Dangerous Blade Vibration Due to Blade Flow Interactions on Centrifugal Compressors
J. Turbomach (October,1990)
Hydrodynamic Design of Rotodynamic Pump Impeller for Multiphase Pumping by Combined Approach of Inverse Design and CFD Analysis
J. Fluids Eng (March,2005)
Exploring the Effect of V-Shaped Cut at Blade Exit of a Double Volute Centrifugal Pump
J. Pressure Vessel Technol (April,2012)
Related Chapters
Introduction
Mixed-flow Pumps: Modeling, Simulation, and Measurements
Introduction
Design and Analysis of Centrifugal Compressors
Openings
Guidebook for the Design of ASME Section VIII Pressure Vessels