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A New Method for Predicting Erosion Damage of Suddenly Contracted Pipe Impacted by Particle Cluster via CFD-DEM.

Authors
  • Cheng, Jiarui1
  • Dou, Yihua2
  • Zhang, Ningsheng3
  • Li, Zhen4
  • Wang, Zhiguo5
  • 1 State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China. [email protected] , (China)
  • 2 Department of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China. [email protected] , (China)
  • 3 State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China. [email protected] , (China)
  • 4 Department of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China. [email protected] , (China)
  • 5 Department of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China. [email protected] , (China)
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Sep 28, 2018
Volume
11
Issue
10
Identifiers
DOI: 10.3390/ma11101858
PMID: 30274228
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

A numerical study on the erosion of particle clusters in an abrupt pipe was conducted by means of the combined computational fluid dynamics (CFD) and discrete element methods (DEM). Furthermore, a particle-wall extrusion model and a criterion for judging particle collision interference were developed to classify and calculate the erosion rate caused by different interparticle collision mechanisms in a cluster. Meanwhile, a full-scale pipe flow experiment was conducted to confirm the effect of a particle cluster on the erosion rate and to verify the calculated results. The reducing wall was made of super 13Cr stainless steel materials and the round ceramsite as an impact particle was 0.65 mm in diameter and 1850 kg/m³ in density. The results included an erosion depth, particle-wall contact parameters, and a velocity decay rate of colliding particles along the radial direction at the target surface. Subsequently, the effect of interparticle collision mechanisms on particle cluster erosion was discussed. The calculated results demonstrate that collision interference between particles during one cluster impact was more likely to appear on the surface with large particle impact angles. This collision process between the rebounded particles and the following particles not only consumed the kinetic energy but also changed the impact angle of the following particles.

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