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Quantifying the effect of strong ignition sources on particle preconditioning and distribution in the 20-L chamber

Citation

Cloney, CT and Ripley, RC and Amyotte, PR and Khan, FI, Quantifying the effect of strong ignition sources on particle preconditioning and distribution in the 20-L chamber, Journal of Loss Prevention in the Process Industries, 26, (6) pp. 1574-1582. ISSN 0950-4230 (2013) [Refereed Article]

DOI: doi:10.1016/j.jlp.2013.08.010

Abstract

Computational fluid dynamics is used to investigate the preconditioning aspect of overdriving in dust explosion testing. The results show that preconditioning alters both the particle temperature and distribution prior toflamepropagation in the 20-L chamber. A parametric study gives thefluid pressure and temperature, and particle temperature and concentration at an assumed flame kernel development time (10 ms) for varying ignitor size and particle diameter. For the 10 kJ ignitor with 50% efficiency, polyethylene particles under 50 μm reach 400 K and may melt prior to flame propagation. Gases from the ignitor detonation displace the dust from the center of the chamber and may increase local particle concentration up to two times thenominal value being tested. These effects have importantimplications for explosive testing of dusts in the 20-L chamber and comparing to larger 1-m3 testing, where these effects may be negligible.

Item Details

Item Type:Refereed Article
Keywords:20-L chamber, dust explosion, numerical modeling, overdriving, preconditioning, computational fluid dynamics, explosion testing, explosions, explosives, numerical models, 20-l chambers, dust explosion, overdriving, particle concentrations, dust
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ocean Engineering
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Environmentally Sustainable Mineral Resource Activities
Objective Field:Environmentally Sustainable Mineral Resource Activities not elsewhere classified
Author:Khan, FI (Professor Faisal Khan)
ID Code:94557
Year Published:2013
Web of Science® Times Cited:2
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-09-11
Last Modified:2017-11-03
Downloads:0

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