Blowout limit of a jet diffusion flame in a coflowing stream of lean gaseous fuel-air mixtures
Journal Article
·
· Combust. Flame; (United States)
The results of a combustor experiment investigating the blowout characteristics of a circular jet diffusion flame in the presence of fuel vapor in a surrounding coflowing stream are reported. For the pilot diffusion flame low velocity a range of jet diameters and discharge velocities were used at ambient initial temperature and pressure. The flammability limit of the premixed system of methane and hydrogen fuels was defined as the fuel concentration for the case when the combustion zone around the jet flame was sufficiently thick to allow a flame to propagate away from the jet flame and fill the cross section of the test apparatus. It was shown that the blowout limit of a circular jet diffusion flame is extended significantly by the introduction of a small amount of fuel vapor in the low-velocity coflowing stream surrounding the jet. The extent of improvement in the blowout limit was related to the concentration of the fuel vapor in the coflowing stream. The addition of a diluent such as nitrogen could extend the blowout limit significantly. The results of the experiment are relevant to the problem of low heating gaseous fuels.
- Research Organization:
- Calgary Univ., Alberta
- OSTI ID:
- 6063390
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 57; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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