Chemical Inhibition of Methane-Air Diffusion Flame. Final Report. September 15, 1993-September 15, 1995.
Chemical Inhibition of Methane-Air Diffusion Flame.
Final Report. September 15, 1993-September 15, 1995.
(2272 K)
Seshadri, K.
NIST GCR 95-685; 41 p. June 1996.
Sponsor:
National Institute of Standards and Technology,
Gaithersburg, MD
Available from:
National Technical Information Service
Order number: PB96-195532
Keywords:
diffusion flames; chemical inhibition; air;
bromotrifluoromethane; carbon monoxide; fire research;
hydrogen; methane; trifluoromethane; water
Abstract:
The principal objective of this research is to clarify
the mechanisms of chemical inhibition of methane-air
diffusion flames by CF3Br and CF3H. An experimental,
numerical and analytical study is conducted. In
inhibited flames at conditions close to flame extinction
significant amount of oxygen is found to leak through
the reaction zone. Therefore an asymptotic analysis is
performed to characterize the structure and critical
conditions of extinction of uninhibited methane-air
diffusion flames. Later this analyses is extended to
methane-air diffusion flames inhibited with CF3Br.
Citical conditions of extinction of the flame are
measured over a wide range with agents added to the air
stream and to the fuel stream. Numerical calculations
with detailed chemistry are performed to calculate the
structure and critical conditions of flame extinction.
The numerical results are compared with the
measurements.
