A1 Journal article (refereed), original research

The effect of front streamline wrapping angle variation in a super-low specific speed centrifugal pump


Publication Details
Authors: Liang Dong, Yuqi Zhao, Houlin Liu, Cui Dai, Vladimirovich Gradov D, Yong Wang
Publisher: SAGE Publications (UK and US)
Publication year: 2018
Language: English
Related journal or series: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
ISSN: 0954-4062
eISSN: 2041-2983
JUFO level of this publication: 1
Permanent website address: http://journals.sagepub.com/home/pic
Open Access: Not an Open Access publication

Abstract

In this research, super-low specific speed centrifugal pump (ns = 25, Chinese units: ns = 3.6nQ1/2/H3/4)
is studied. The effect of the front streamline wrapping angles
variation (135°, 139° and 145°) of the turbine on energy performance is
considered. The pressure pulsation, interior and exterior noise
characteristics and the performance of the impeller are thoroughly
evaluated both experimentally and numerically. The pump has been modeled
by means of computational fluid dynamics code of commercial software
ANSYS CFX 11.0 to estimate energy performance and pressure pulsation.
Boundary element method and finite element method are used to
investigate the interior and exterior noise characteristics of the
centrifugal pump by varying the front sweep angle. The front sweep angle
variation was found to have insignificant influence on centrifugal pump
performance characteristics. However, it influences fluid hydrodynamics
around the volute tongue. In addition, the decreasing of the front
streamline sweep angle slightly reduces the sound pressure level for the
exterior acoustics, but the radiation distribution of the acoustic
field does not change. In its turn, the modified trailing edge of the
blades can reduce the peak value of the superposition decreasing the
pressure pulsations at the blade passing frequency and its harmonic
frequencies.


Last updated on 2019-13-03 at 12:00

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