Document


Title

Mathematical model and sensor development for measuring energy transfer from wildland fires
Document Type: Journal Article
Author(s): Erik A. Sullivan; André G. McDonald
Publication Year: 2014

Cataloging Information

Keyword(s):
  • Canada
  • energy
  • fire energy
  • fire management
  • forest management
  • heat
  • heat flux
  • heat flux measurement
  • heat transfer
  • wildfires
  • wildland fire
  • wildland forest fires
Record Maintained By:
Record Last Modified: July 2, 2019
FRAMES Record Number: 53388
Tall Timbers Record Number: 30769
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

Current practices for measuring high heat flux in scenarios such as wildland forest fires use expensive, thermopile-based sensors, coupled with mathematical models based on a semi-infinite-length scale. Although these sensors are acceptable for experimental testing in laboratories, high error rates or the need for water cooling limits their applications in field experiments. Therefore, a one-dimensional, finite-length scale, transient-heat conduction model was developed and combined with an inexpensive, thermocouple-based rectangular sensor, to create a rapidly deployable, non-cooled sensor for testing in field environments. The proposed model was developed using concepts from heat conduction and with transient temperature boundary conditions, to avoid complicated radiation and convection conditions. Constant heat flux and tree-burning tests were respectively conducted using a mass loss cone calorimeter and a propane-fired radiant panel to validate the proposed analytical model and sensor as well as test the sensor in a simulated forest fire setting. The sensor was mounted directly beside a commercial Schmidt-Boelter gauge to provide data for comparison. The proposed heat flux measurement method provided results similar to those obtained from the commercial heat flux gauge to within one standard deviation. This suggests that the use of a finite-length scale model, coupled with an inexpensive thermocouple-based sensor, is effective in estimating the intense heat loads from wildland fires.

Online Link(s):
Citation:
Sullivan, Erik A.; McDonald, André G. 2014. Mathematical model and sensor development for measuring energy transfer from wildland fires. International Journal of Wildland Fire 23(7):995-1004.