Ignition properties of thermally thin plastics: the effectiveness of non-competitive char formation in reducing flammability. Issue 3 (2002)

• Record Type: Journal Article
• Authors: Nelson, M. I.; Brindley, J.; Mcintosh, A. C.
• Is Part Of: Journal of applied mathematics & decision sciences. Volume 6:Issue 3(2002)
• Page Start: 155
• Page End: 181
• Publication Date: 2002
• Subjects: Operations research -- Periodicals; Mathematical models -- Periodicals; Statistics -- Periodicals; Quality control -- Periodicals; Mathematical models; Operations research; Quality control; Statistics; Periodicals; 519.05
• DOI: 10.1155/S117391260200010X
• Languages: English
• ISSNs: 1173-9126

Abstract

Abstract : The retardancy effect of char formation upon the flammability of thermally thin products is investigated. The char is formed in a single-step non-competitive scheme and is assumed to be thermally stable. The criterion for ignition is that of a critical mass flux of volatiles from the solid into the gas phase. Both steady-state and transient formulations of the model are considered. In the high activation energy limit the critical heat flux efficiency in the steady-state model is proportional toc / ( 1 − c ), wherec is the fraction of char formed. In the transient model the efficiency in reducing the maximum heat release rate, average heat release rate, and total heat released is given byc and is independent of activation energy and heat flux. The specific application that we have in mind for our model is piloted ignition in the cone calorimeter.