Document


Title

Thermal infrared emission-transmission measurements in flames from a cylindrical forest fuel burner
Document Type: Journal Article
Author(s): Jean-Luc Dupuy; Philippe Vachet; Joel Marechal; Juan Melendez; Antonio J. de Castro
Publication Year: 2007

Cataloging Information

Keyword(s):
  • combustion
  • fire management
  • flame length
  • forest fires
  • fuel management
  • gases
  • heat
  • IR thermography
  • laboratory fires
  • needles
  • particulates
  • photography
  • Pinus pinaster
  • radiation
  • radiation
  • smoke management
  • soot
  • soot
  • statistical analysis
  • temperature
  • wildfires
Record Maintained By:
Record Last Modified: November 9, 2018
FRAMES Record Number: 45982
Tall Timbers Record Number: 21625
TTRS Location Status: In-file
TTRS Call Number: Journals-I
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

We describe emission-transmission measurements performed at different heights in a flame from a cylindrical forest fuel burner, using a camera operating in the thermal infrared (7.5-13 µm). The forest fuel burner was made of a cylindrical wire mesh basket filled with a forest fuel (Pinus pinaster needles), which was ignited at the base of the basket. Three diameters of basket were used (20, 28 and 40 cm). Heat release rates, as calculated from weighing of the basket and heat of combustion of the fuel, ranged between 50 and 170 kW and flame heights ranged between 1 and 2m. The emission-transmission device allows the determination of the transmittance of the flame and of a radiometric temperature. We show that radiation was dominated by soot in the spectral range of the camera, but that radiation from gaseous products of the combustion was not negligible. Using the Mie theory in its Rayleigh limit, we deduced some average volume fractions of soot from the measurements, which peaked at 6.8 x 10-6 in the persistent region of the flame. Then the total extinction coefficient and the total emissivity of the flame due to soot were calculated according to a standard method. Measured transmittance, soot volume fraction, total extinction coefficient and total emissivity were found to scale with the normalised height of measurement Z, defined as the ratio of the height of measurement to the height of the flame (0.25 < Z < 1.6). © IAWF 2007. Reproduced from the International Journal of Wildland Fire (Jean-Luc Dupuy, et al., 2007) with the kind permission of CSIRO PUBLISHING on behalf of the International Association of Wildland Fire.

Online Link(s):
Citation:
Dupuy, J., P. Vachet, J. Marechal, J. Melendez, and A. J. de Castro. 2007. Thermal infrared emission-transmission measurements in flames from a cylindrical forest fuel burner. International Journal of Wildland Fire, v. 16, no. 3, p. 324-340. 10.1071/.