Determination of slug permeability factor for pressure drop prediction of slug flow pneumatic conveying--颗粒学报PARTICUOLOGY

Tan, S., Williams, K. C., Jones, M. G., & Krull, T. (2008). Determination of slug permeability factor for pressure drop prediction of slug flow pneumatic conveying. Particuology, 6(5), 307–315. https://doi.org/10.1016/j.partic.2008.05.001

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

Shengming Tan^*, Kenneth C. Williams, Mark G. Jones, Tobias Krull

Centre for Bulk Solids and Particulate Technology, The University of Newcastle, Callaghan, NSW 2308, Australia

10.1016/j.partic.2008.05.001

Volume 6, Issue 5, October 2008, Pages 307-315

Received 9 January 2008, Accepted 23 May 2008, Available online 15 July 2008.

E-mail: shengming.tan@newcastle.edu.au

Highlights

Abstract

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.

Graphical abstract

Keywords

Slug flow pneumatic conveying; Pressure drop; Air mass conversation; Slug permeability factor

文章导读