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Author Rivera, J.I.; Ebensperger, F.; Valenzuela, F.; Escandar, L.; Reszka, P.; Fuentes, A.
Title Understanding the role of fire retardants on the discontinuous ignition of wildland fuels Type
Year 2023 Publication (up) Proceedings Of The Combustion Institute Abbreviated Journal Proc. Combust. Inst.
Volume 39 Issue 3 Pages 3775-3783
Keywords Ignition delay time; Critical heat flux; Thermal model; Effective properties; Pine needles
Abstract This work reports on a theoretical and experimental study on the role of fire retardant treatments on the discontinuous ignition of wildland fuels. The effect of the concentration of fire retardant in the solution applied to the vegetation is as expected to increase the ignition delay time. We found that the fire retardant modifies the fuel bed effective thermophysical properties, delaying the thermal response of the specimen when subjected to an incident heat flux. Nevertheless, the critical heat flux remains unaltered within the experimental error. We followed a proven approach based on the thermal ignition theory and testing which however has not been previously employed to study fire retardants on wildland fuels. To carry this out, we performed experiments on the I-FIT apparatus, which yields repeatable results and controlled boundary conditions. The theoretical model shows a good agreement with the experimental results, delivering simple expressions for pencil-and-paper calculations of the ignition delay time and analytical tools to evaluate effective fuel properties. These results will help CONAF and other forest services around the world to gain insight on the optimal concentrations and delivery methods for these types of products during wildfire response. & COPY; 2022 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
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ISSN 1540-7489 ISBN Medium
Area Expedition Conference
Notes WOS:001019726900001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1842
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