Johnsson, E.
, Di Cristina Torres, G.
, Mueller, E.
, Bundy, M.
, Chakalis, A.
, Fernandez, M.
and Hamins, A.
(2025),
The Burning Characteristics of 3 m to 6 m Dry Douglas-Fir Trees, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2327, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959226
(Accessed April 12, 2025)
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The Burning Characteristics of 3 m to 6 m Dry Douglas-Fir Trees
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Abstract
A series of experiments are reported on the burning behavior of dry, 3 m to 6 m tall, Douglas fir trees. The measurements were conducted in the open under quasi-quiescent conditions. The global measurements reported include the transient, peak, and total heat release rates, the yields of CO and soot, the mass loss, and near and far-field heat fluxes. The appearance of the trees was captured by photogrammetry. The fires were documented by video cameras from several perspectives. Measurements of the heat flux to the surroundings from the specimens were used to estimate the radiative fraction of the fires. The total heat release measured by calorimetry and the ideal heat release calculated from the product of the total mass loss and the heat of combustion were found to be in reasonable agreement. The ratio of the CO yield to the soot yield was measured as nearly constant over a wide range of total heat release rates. A first pass at a rescaling methodology is presented, which corrects the transient heat release rate for system time response. The results provide unique calorimetric data which can be useful for development of design fire scenarios by fire protection engineers. The data from the study is available on the NIST Fire Calorimetry Database (FCD), which links to this report.Citation
Technical Note (NIST TN) - 2327
Report Number
2327
NIST Pub Series
Pub Type
NIST Pubs
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Keywords
burning rate, fire calorimetry database, trees, heat release rate, radiative emission
Citation
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Created February 5, 2025