Polyurethane Foam Response To High Heat Fluxes
Author(s)
M. L. Hobbs & G. H. Lemmon
Abstract
A Simple Polyurethane Foam (SPUF) mass loss and response model has been
developed to predict the behavior of unconfined, rigid, closed-cell, polyurethane
foam-filled systems exposed to fire-like heat fluxes. The model is based on simple
two-step mass loss kinetics using distributed Arrhenius reaction rates. The
initial reaction step assumes that the foam degrades into a primary gas and a reactive
solid. The reactive solid subsequently degrades into a secondary gas. The
SPUF decomposition model was implemented into the finite element (FE) heat
conduction codes COYOTE [I] and CALORE [2], which support chemical kinetics
and dynamic enclosure radiation using "element death." A discretization bias
correction model was parameterized using elements with characteristic lengths
ranging from I-mm to 1-cm. Bias corrected solutions using the SPUF response
model w
Keywords
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