Numerical analysis on the wall-thinning rate of a bent pipe by liquid droplet impingement erosion

被引：16

作者：

Fujisawa, Nobuyuki ^{[1
]}

Wada, Keitaro ^{[2
]}

Yamagata, Takayuki ^{[1
]}

机构：

[1] Niigata Univ, Visualizat Res Ctr, Nishi Ku, 8050,Ikarashi 2 Nocho, Niigata 9502181, Japan

[2] Niigata Univ, Grad Sch Sci & Technol, Nishi Ku, 8050,Ikarashi 2 Nocho, Niigata 9502181, Japan

来源：

ENGINEERING FAILURE ANALYSIS | 2016年 / 62卷

基金：

日本学术振兴会;

关键词：

Pipe-wall thinning; Liquid droplet impingement; Erosion; Numerical analysis; Nuclear/fossil power plant; ATTENUATION; IMPACT;

D O I：

10.1016/j.engfailanal.2016.01.005

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents a numerical analysis of liquid droplet impingement (LDI) erosion in the pipeline of nuclear/fossil power plants. The numerical method is based on combining a Eulerian/Lagrangian computational fluid dynamics (CFD) model with an erosion model to consider various aspects of LDI erosion, such as the influence of the droplet velocity, diameter, number density, impingement angle, material hardness, liquid-film thickness, and erosion depth on the wall-thinning rate. A numerical analysis of the erosion depth distribution was carried out for the LDI erosion of a bent pipe downstream of an orifice at the Onagawa power plant incident in 2007. The results were compared with existing erosion models, and the variations in the peak erosion depths were examined. The present model results showed reasonable agreement with the prototype results at the location and the erosion depth distribution of the bent pipe. The comparison showed the importance of the liquid film and erosion depth to predicting the LDI erosion characteristics. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：306 / 315

页数：10

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