- Author
- Pitts, W. M.
- Title
- Importance of Isothermal Mixing Processes to the Understanding of Lift-Off and Blow Out of Turbulent Jet Flames.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Journal
- Combustion and Flame, Vol. 76, No. 2, 197-212, 1989
- Sponsor
- Air Force Systems Command, Washington, DC
- Contract
- GRANT-AFOSR-ISSA-86-0008
- Keywords
- turbulent jet flames | flame liftoff | blow off | density effects | flame stability | mixing
- Identifiers
- isothermal flows
- Abstract
- Many different theoretical anlayses have been developed to predict the lift-off and blowout behaviors of axisymmetric, turbulent jet diffusion flames. Past theoretical and experimental work is summarized. It is then shown that these flame stability properties can be predicted using the known time-averaged concentration and velocity profiels of the corresponding nonreacting jet flows of the fuels into air. In contrast to past theoretical treatments of these processes it is not necessary to consider interactions of the turbulent concentration and/or velocity fluctuations with the combustion process. Possible physical mechanisms that can lead to such a finding are discussed.