Prediction and validation of blowout limits of co-flowing jet diffusion flames -- effect of dilution
Book
·
OSTI ID:376310
- Univ. of Calgary, Alberta (Canada). Dept. of Mechanical Engineering
The blowout limits of a co-flowing turbulent methane jet diffusion flame with addition of diluent in either jet fuel or surrounding air stream is studied both analytically and experimentally. Helium, nitrogen and carbon dioxide were employed as the diluents. Experiments indicated that an addition of diluents to the jet fuel or surrounding air stream decreased the stability limit of the jet diffusion flames. The strongest effect was observed with carbon dioxide as the diluent followed by nitrogen and then by helium. A model of extinction based on recognized criterion of the mixing time scale to characteristic combustion time scale ratio using experimentally derived correlations is proposed. It is capable of predicting the large reduction of the jet blowout velocity due to a relatively small increase in the co-flow stream velocity along with an increase in the concentration of diluent in either the jet fuel or surrounding air stream. Experiments were carried out to validate the model. The predicted blowout velocities of turbulent jet diffusion flames obtained using this model are in good agreement with the corresponding experimental data.
- OSTI ID:
- 376310
- Report Number(s):
- CONF-960154--; ISBN 0-9648731-8-4
- Country of Publication:
- United States
- Language:
- English
Similar Records
An experimental investigation of the blowout limits of a jet diffusion flame in co-flowing streams of different velocity and composition
Prediction of the blowout of jet diffusion flames in a coflowing stream of air
Effect of burner geometry on the blowout limits of jet diffusion flames in a co-flowing oxidizing stream
Journal Article
·
Tue Jun 01 00:00:00 EDT 1993
· Journal of Energy Resources Technology; (United States)
·
OSTI ID:6346589
Prediction of the blowout of jet diffusion flames in a coflowing stream of air
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:163209
Effect of burner geometry on the blowout limits of jet diffusion flames in a co-flowing oxidizing stream
Book
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:163210