流体机械

2013, v.41;No.494(08) 45-47+71

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煤液化多相流输送弯管冲蚀磨损数值研究
Numerical Investigation of Erosion for Multiphase Flow Elbow in Coal Liquefaction

孙海疆;偶国富;肖定浩;李伟正;
SUN Hai-jiang;OU Guo-fu;XIAO Ding-hao;LI Wei-zheng;Beijing Yanhua construction Engineering,Co. Ltd.;The Lab of Multi-Phase Deposition and Erosion,Zhejiang Sci-Tech University;

摘要(Abstract):

针对煤液化中液-固两相流输送过程造成管道系统的冲蚀磨损失效问题,以90°圆形截面弯管结构为研究对象,采用标准k-ε湍流模型、颗粒轨道模型和冲蚀磨损模型,对弯管内的流动特性和壁面磨损率进行数值计算。研究表明,靠近弯管背部的流场速度高于腹部,粒子向背部聚集,导致背部的冲蚀磨损较其它部位更为严重。因此,实际管道系统中的弯管背部应为定点测厚重点监测区域。
The elbow in Coal liquefaction are suffered by severe solid particle erosion when used to convey liquid-solid twophase medium. Take the typical structure of 90° circular cross section bend as the research object,using standard k-ε turbulence model,particle track model and erosion wear model for bending tube flow characteristics and wall wear rate for numerical calculation. Research shows,close to bend back flow faster than abdomen,particle to back together,leading to the back of the serious erosion wear in other place,therefore,the actual pipeline system of bend back should be key monitoring area.

关键词(KeyWords): 煤液化;弯管;多相流;冲蚀磨损;数值研究
coal chemical industry;elbow;multiphase flow;erosion wear;numerical simulation

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作者(Author): 孙海疆;偶国富;肖定浩;李伟正;
SUN Hai-jiang;OU Guo-fu;XIAO Ding-hao;LI Wei-zheng;Beijing Yanhua construction Engineering,Co. Ltd.;The Lab of Multi-Phase Deposition and Erosion,Zhejiang Sci-Tech University;

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