Thermal Agent Extinguishment of Two Types of Diffusion Flames.
Thermal Agent Extinguishment of Two Types of Diffusion
Pitts, W. M.; Bryant, R. A.; Yang, J. C.
Combustion Institute/Western States Secion. U.S.
Sections of the Combustion Institute, 2nd Joint Meeting.
Hosted by Lawrence Berkeley National Laboratory.
Proceedings. March 25-28, 2001, Oakland, CA, 1-16 pp,
diffusion flames; extinguishment; burners; combustion;
diluents; fire extinguishing agents; fire suppression;
The extinguishment of diffusion flames on two types of
burners-an opposed-flow Tsuji burner and an axisymmetric
burner with a surrounding coflow-by thermal agents has
been investigated. Thermal agents are those that act
primarily by extracting heat and diluting the flame. In
this study nitrogen, argon, helium, and carbon dioxide
have been used as thermal agents. Both methane and
propane have been used as fuels. Extinguishing
concentrations are found to depend on the agent, type of
burner, and on the fuel used. Propane flames are found
to be more difficult to extinguish than methane flames
on the same burner, while the Tsuji-type burner requires
much higher concentrations of thermal agents for
extinguishment than the coflow burner. Possible
explanations for the observed differences are discussed.