煤仓颗粒流流型及压力分布的数值研究

IF 1.6 3区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Geophysics and Engineering Pub Date : 2023-07-08 DOI:10.1093/jge/gxad052

De-fu Zhu, Xingwang Ji, Y. Huo, Zhonglun Wang, Biaobiao Yu, Deyu Wang

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引用次数: 1

摘要

煤仓的稳定装载和运行是高效生产的关键。在本研究中，基于休止角特性对煤颗粒接触参数进行标定。利用EDEM软件对煤仓的装卸过程进行了数值模拟。此外，还研究了煤颗粒的流动规律和壁面压力的分布特征。结果表明，煤颗粒在煤仓内可分为质量流和漏斗流两种流动形式。泄流过程中，管壁压力波动，出现局部超压现象，最大压力系数为1.75。最后，基于压力拱影响机理，对煤颗粒流动形态的转变和壁面压力的分布特征进行了合理解释。研究结果可为煤仓结构设计提供理论指导。

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Numerical Investigation of Particles Flow Pattern and Pressure Distribution of Coal Bunker

The stable loading and operation of a coal bunker is critical for efficient production. In this study, the coal particle contact parameters were calibrated based on the angle of repose characteristics. The loading and discharging process of the coal bunker was simulated using the EDEM program. In addition, the flow pattern of the coal particles and the distribution characteristics of the wall pressure were investigated. The results indicate that the coal particles in the bunker can be divided into two flow patterns: mass flow and funnel flow. During discharging, the wall pressure fluctuated and exhibited a local over-pressure phenomenon, with a maximum pressure coefficient of 1.75. Finally, this study provides a reasonable explanation for the transformation of the flow pattern of coal particles and the distribution characteristics of wall pressure based on the mechanism of pressure arch influence. The findings of this study can provide theoretical guidance for designing coal bunker structures.

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来源期刊

Journal of Geophysics and Engineering 工程技术-地球化学与地球物理

CiteScore

2.50

自引率

21.40%

发文量

审稿时长

4 months

期刊介绍： Journal of Geophysics and Engineering aims to promote research and developments in geophysics and related areas of engineering. It has a predominantly applied science and engineering focus, but solicits and accepts high-quality contributions in all earth-physics disciplines, including geodynamics, natural and controlled-source seismology, oil, gas and mineral exploration, petrophysics and reservoir geophysics. The journal covers those aspects of engineering that are closely related to geophysics, or on the targets and problems that geophysics addresses. Typically, this is engineering focused on the subsurface, particularly petroleum engineering, rock mechanics, geophysical software engineering, drilling technology, remote sensing, instrumentation and sensor design.