Laminar Wake Flame Heights

[+] Author and Article Information
C. M. Kinoshita, P. J. Pagni

Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Heat Transfer 102(1), 104-109 (Feb 01, 1980) (6 pages) doi:10.1115/1.3244219 History: Received October 17, 1979; Online October 20, 2009


One important measure of material fire hazard is the flame height a given polymer produces upon burning in a specified ambience. Six systems are considered here—two fuel geometries: wall-mounted and free standing; and three flow fields: forced, free and mixed-mode. In each case, the extent of the combusting gas downstream of a pyrolyzing slab is obtained as a function of the fuel’s thermochemical properties. The flow is modeled as a steady, laminar, two-dimensional, nonradiative boundary layer. The combustion is described by a single Shvab-Zeldovich energy-species equation assuming unit Lewis number and a fast one-step overall gas phase reaction. Numerical methods are employed due to the abrupt change in boundary conditions at the end of the pyrolyzing slab. However, an approximate similarity solution is found for forced flow which yields explicit flame heights. Based on these results, explicit functional fits to numerical flame heights are obtained for free and mixed-mode flows. Comparisons between theory and experiment indicate quantitative agreement.

Copyright © 1980 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In