- Author
- Pitts, W. M.
- Title
- Assessment of Theories for the Behavior and Blowout of Lifted Turbulent Jet Diffusion Flames.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- Combustion Institute, Symposium (International) on Combustion, 22nd. August 14-19, 1988, Seattle, WA, 809-816 p., 1988
- Keywords
- diffusion flames | jet flames | turbulent jet flames | blowout fires | flame stability
- Identifiers
- turbulent structure of fuel jets
- Abstract
- Many competing theories have been published to describe the characteristics and blowout of lifted turbulent jet diffusion flames. The assumptions which are made as to the physical process responsible for these behaviors vary widely. In this paper these assumptions are summarized for each model and compared with the actual turbulent behaviors of unignited fuel jets. As part of this discussion, recent unpublished measurements of real-time concentration fluctuations along a line in a turbulent fuel jet are introduced. To the extent possible, each theory is also assessed as to its capabilities to accurately predict experimentally observed lift off and blowout behaviors. The conclusion of these analyses is that none of the currently available theories for flame stabilization are satisfactory. Further experimentation is required before the actual physical processes responsible for flame stabilization can be identified and models which are capable of accurate prediction of lift off heights and blowout velocities developed.