Determination of slug permeability factor for pressure drop prediction of slug flow pneumatic conveying

作     者：Kenneth C.Williams Mark G.Jones Tobias Krull 

作者机构：Centre for Bulk Solids and Particulate TechnologyThe University of NewcastleCallaghanNSW 2308Australia 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2008年第6卷第5期

页      面：307-315页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

主　　题：Slug flow pneumatic conveying Pressure drop Air mass conversation Slug permeability factor 

摘      要：Current models for pressure drop prediction of slug flow pneumatic conveying in a horizontal pipeline system assume some type of steady state conditions for prediction, which limits their capability for increased predictive accuracy relative to experimental data. This is partly because of the nature of slug flow pneumatic conveying system, which, as a dynamic system, never becomes stable. By utilising conservation of mass （airflow）, a dynamic pressure analysis model is proposed on the basis of the derivative of the upstream pressure behaviour. The rate of air permeation through slug, one of the important factors in the conservation model, is expressed as a function of a slug permeability factor. Other factors such as slug velocity, slug length and the fraction of stationary layer were also considered. Several test materials were conveyed in single-slug tests to verify the proposed pressure drop model, showing good agreement between the model and experimental results.