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Numerical and experimental research on the erosion of solid-liquid two-phase flow in transport butterfly valve based on DEM method

Benliang Xu (Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, China and Zhejiang Business College, Hangzhou, China)
Zuchao Zhu (Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, China and National-provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Hangzhou, China)
Zhe Lin (Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, China and National-provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Hangzhou, China)
Dongrui Wang (Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, China)
Guangfei Ma (Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 10 May 2021

Issue publication date: 2 June 2021

205

Abstract

Purpose

The purpose of this paper is to analyze the mechanism of particle erosion in butterfly valve pipelines under hydraulic transportation conditions. The results will affect the sealing and safety of butterfly valve pipelines and hopefully serve as reference for the anti-erosion design of butterfly valve pipelines.

Design/methodology/approach

Through the discrete element method (DEM) simulation that considers the force between particles, the detached eddy simulation (DES) turbulence model based on realizable k-epsilon is used to simulate the solid-liquid two-phase flow-induced erosion condition when the butterfly valve is fully opened. The simulation is verified by building an experimental system correctness. The solid-liquid two-phase flow characteristics, particle distribution and erosion characteristics of the butterfly valve pipeline under transportation conditions are studied.

Findings

The addition of particles may enhance the high-speed area behind the valve. It first increases and then decreases with increasing particle size. With increasing particle size, the low-velocity particles change from being uniformly distributed in flow channel to first gathering in the front of the valve and, then, to gathering in lower part of it. Fluid stagnation at the left arc-shaped flange leads to the appearance of two high-speed belts in the channel. With increasing fluid velocity, high-speed belts gradually cover the entire valve surface by focusing on the upper and lower ends, resulting in the overall aggravation of erosion.

Originality/value

Considering the complexity of solid-liquid two-phase flow, this is the first time that the DEM method with added inter-particle forces and the DES turbulence model based on realizable k-epsilon has been used to study the flow characteristics and erosion mechanism of butterfly valves under fully open transportation conditions.

Keywords

Acknowledgements

This work has been supported by the National Natural Science Foundation of China (Grant No. 51876193).

Citation

Xu, B., Zhu, Z., Lin, Z., Wang, D. and Ma, G. (2021), "Numerical and experimental research on the erosion of solid-liquid two-phase flow in transport butterfly valve based on DEM method", Industrial Lubrication and Tribology, Vol. 73 No. 4, pp. 606-613. https://doi.org/10.1108/ILT-12-2020-0454

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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