含缺陷串联弯管冲蚀规律研究  

Study on Erosion Law of Series Elbow with Defects

作　　者：刘方 李美求[1] 胡曼玉 陈星 Liu Fang;Li Meiqiu;Hu Manyu;Chen Xing(Institute of Mechanical Structure Strength and Vibration,Yangtze University,Jingzhou,Hubei 434023,China)

机构地区：[1]长江大学机械结构强度与振动研究所,湖北荆州434023

出　　处：《化工设备与管道》2024年第6期95-102,共8页Process Equipment & Piping

基　　金：国家科技重大专项子课题,易损件寿命预估方法研究(2016ZX05038-001-LH002)。

摘　　要：串联弯管被广泛应用于高压油气输运行业,固体颗粒对弯管冲蚀磨损产生缺陷是导致弯管失效的主要原因。为进一步研究含缺陷串联弯管冲蚀规律,文章基于冲蚀和气-固两相流理论,采用数值模拟的方法分析完整串联弯管冲蚀特性来建立串联弯管缺陷模型,探究了缺陷结构参数边长、深度对串联弯管冲蚀规律的影响。研究结果表明:含缺陷串联弯管相较完整串联弯管冲蚀现象更为明显,且含缺陷串联弯管最大冲蚀率位于缺陷产生处,同时入口段弯管的缺陷会对出口段弯管最大冲蚀率产生影响,出口段弯管缺陷对入口段弯管最大冲蚀率几乎无影响。当缺陷位于入口段弯管时,入口段弯管最大冲蚀率随着缺陷边长、深度的增大先增大后减小。当缺陷位于出口段弯管时,出口段弯管最大冲蚀率随边长的增大先增大后减小,随深度增大逐渐减小。研究结果可为串联弯管缺陷发展规律以及后续串联弯管结构优化提供理论参考。Series bending pipe is widely used in high pressure oil and gas transportation industry.The main reason of bending pipe failure is the defect caused by erosion wear of solid particles on bending pipe.In order to further study the erosion rule of series bending pipe with defects,based on the theory of erosion and gas-solid two-phase flow,this paper adopts numerical simulation method to analyze the erosion characteristics of complete series bending pipe to establish a series bending defect model,and explores the influence of defect structure parameter side length and depth on the erosion rule of series bending pipe.The research results show that the erosion phenomenon of series bending with defects is more obvious than that of complete series bending,and the maximum erosion rate of series bending with defects is located at the place where the defects occur.Meanwhile,the bending defects of inlet section will affect the maximum erosion rate of outlet section,while the bending defects of outlet section have almost no influence on the maximum erosion rate of inlet section.When the defect is located in the inlet bend,the maximum erosion rate of the inlet bend first increases and then decreases with the increase of the defect side length and depth.When the defect is located in the outlet bend,the maximum erosion rate of the outlet bend first increases and then decreases with the increase of the side length,and gradually decreases with the increase of the depth.The research results can provide a theoretical reference for the development law of series bend defects and the subsequent optimization of series bend structure.

关 键 词：串联弯管 气-固两相流 冲蚀特性 冲蚀规律 

分 类 号：TE973[石油与天然气工程—石油机械设备]