62
Views
5
CrossRef citations to date
0
Altmetric
Original Articles

Influence of Absorption by Environmental Water Vapor on Radiation Transfer in WildLand Fires

, &
Pages 509-518 | Published online: 23 Jan 2008
 

Abstract

The attenuation of radiation transfer from wildland flames to fuel by environmental water vapor is investigated. Emission is tracked from points on an idealized flame to locations along the fuel bed while accounting for absorption by environmental water vapor in the intervening medium. The Spectral Line Weighted-sum-of-gray-gases approach was employed for treating the spectral nature of the radiation. The flame and fuel bed for the simulations are modeled two-dimensionally with the flame being one-tenth as long as the fuel bed. Flame heights of 1 and 10 m were explored, and both vertical and angled flames were studied. Simulated flame temperatures of 1000 K and 1500 K were investigated. The study reveals that the effect of absorption of flame radiation by environmental water vapor is quite modest locally. For the worst-case scenario of 100% relative humidity, water vapor was found to reduce the incident radiant flux at the base of a vertically oriented flame at 1000 K flame by 9% for a 1 m flame and 16% for a 10 m flame. Radiation from the angled flame (30 deg from the vertical) experiences less attenuation from water vapor than the vertical flame. Further, local attenuation of the hotter flame (1500 K) from environmental water vapor is higher than for the 1000 K flame. The relative effect of the water vapor attenuation increases with distance from the flame base.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 1,493.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.