- Author
- Messaoudene, N. A. | Tien, J. S.
- Title
- Rate Constants for Polymethylmethacrylate Diffusion Flame Using a Semi-Global Reaction Model. Volume 3. Final Report.
- Coporate
- Case Western Reserve Univ., Cleveland, OH
- Sponsor
- National Bureau of Standards, Gaithersburg, MD
- Report
- NBS GCR 86-508, February 1986, 57 p.
- Distribution
- Available from National Technical Information Service
- Contract
- NBS-GRANT-60-NANB-D0013
- Keywords
- combustion | combusion physics | diffusion flames | extinction | polymethyl methacrylate | reaction kinetics | reaction models
- Abstract
- A numerical study of the combustion and extinction in the stagnaion point boundary layer of a condensed fuel (PMMA) has been performed using a three-step semi-global reactions model. In the first step considered, fuel is oxidized to form carbon monoxide and water vapor. In the second, carbon monoxide is oxidized to form carbon dioxide, and in the third reaction, carbon dioxide decomposes into carbon dioxide, and in the third reaction, carbon dioxide decomposes into carbon monoxide and oxygen, which is the reverse of the second reaction. The governing equations were transformed into a set of ordinary differential equations through a similarity variable. Fictitious unsteady terms were added to the ordinary differential equations and the resulting equations were solved numerically using an explicit scheme for the fictitions unsteady terms. Use has been made of Howard, et. al., kinetics constants for the forward reaction of CO (second reaction), and constants calculated from equilibrium considerations for the backward reaction (third reaction).