基于煤粉堆积角的EDEM颗粒接触参数标定

doi:10.16265/j.cnki.issn1003-3033.2020.07.017

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (7): 114-119.doi: 10.16265/j.cnki.issn1003-3033.2020.07.017

基于煤粉堆积角的EDEM颗粒接触参数标定

问小江, 方飞飞, 刘应科副教授, 李健

中国矿业大学安全工程学院,江苏徐州 221116

收稿日期:2020-04-17 修回日期:2020-06-13 出版日期:2020-07-28 发布日期:2021-07-15
作者简介:问小江 (1996—),男,山西临县人,硕士研究生,研究方向为煤矿瓦斯的地面开发。E-mail:wen19960420@126.com。
基金资助:
国家自然科学基金面上项目资助(51774277);江苏“六大人才高峰”高层次人才项目(JNHB-091);江苏高校“青蓝工程”中青年学术带头人项目。

Research on stacking angle of coal particles and parameter calibration on EDEM

WEN Xiaojiang, FANG Feifei, LIU Yingke, LI Jian

School of Safety Engineering, China University of Mining & Technology, Xuzhou Jiangsu 221116, China

Received:2020-04-17 Revised:2020-06-13 Online:2020-07-28 Published:2021-07-15

摘要/Abstract

摘要： 为了使EDEM软件中数值模拟结果能够准确地反映煤粉颗粒的流动特性,设计颗粒-颗粒接触参数标定的正交试验,提出基于煤粉颗粒堆积角的颗粒-颗粒接触参数标定方法。采用极差分析法和方差分析法分析颗粒-颗粒接触参数的最优因素水平和接触参数对堆积角的影响显著性。研究结果表明:选用的550～600 μm煤粉颗粒堆积角真值为30.33°;颗粒-颗粒的滚动摩擦系数对堆积角计算结果的影响最为显著,静摩擦系数次之,恢复系数最小;当EDEM中颗粒-颗粒的滚动摩擦系数、静摩擦系数、恢复系数依次为0.3、0.5和0.1时,颗粒堆积角结果为30.13°,相对误差仅为0.66%,为最佳的接触参数组合值。

关键词: EDEM, 煤粉颗粒, 堆积角, 颗粒-颗粒接触参数, 正交试验

Abstract: In order to make numerical simulation results on EDEM in better agreement with flow characteristics of coal particles, orthogonal experiments of particle-particle contact parameters calibration were designed and a calibration method was proposed based on stacking angle of particles. Then, optimal level of parameters and significance of their impact on stacking angle were analyzed by utilizing range analysis and variance analysis methods. The results show that stacking angle of 550-600 μm coal particles is 33.33°, and rolling friction coefficient induces most significant influence on it, followed by coefficient of static friction and that of restitution. Moreover, when coefficient of restitution, static friction and rolling frction is 0.3, 0.5 and 0.1 respectively on EDEM, stacking angle of coal particles will be 30.13° with a relative error of merely 0.66%, indicating that is an optimal contact parameter combination.

Key words: EDEM, pulverized coal particles, stacking angle, particle-particle contact parameters, orthogonal experiment

中图分类号:

X936

问小江, 方飞飞, 刘应科, 李健. 基于煤粉堆积角的EDEM颗粒接触参数标定[J]. 中国安全科学学报, 2020, 30(7): 114-119.

WEN Xiaojiang, FANG Feifei, LIU Yingke, LI Jian. Research on stacking angle of coal particles and parameter calibration on EDEM[J]. China Safety Science Journal, 2020, 30(7): 114-119.

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基于煤粉堆积角的EDEM颗粒接触参数标定

Research on stacking angle of coal particles and parameter calibration on EDEM

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