Studies of combustion and emissions in a model step swirl combustor
- Univ. of Dayton, OH (United States). Dept. of Mechanical & Aerospace Engineering
Combustion and pollutant emissions from fossil-fired and gas turbine cycle power plants are increasingly receiving close scrutiny because of the Clean Air Act of 1991. In this paper, an investigation of combustion and pollutant emissions in a model step swirl combustor (SSC) is described, specifically flame characteristics, lean blowout (LBO), reactive flow field, and CO and NO{sub x} emissions. The SSC was designed to simulate a practical gas turbine combustor. Flame photographs and LBO measurements illustrate that the co-swirl provides more stable combustion and yields slightly lower values of LBO than the counter-swirl arrangement. The co-swirl arrangement also contributes to high velocity gradients, intense mixing, and temperature uniformity. Finally, CO and NO{sub x} emissions follow opposite trends as expected, i.e., CO formation is a minimum in the region of maximum NO{sub x} emissions. Also, the recirculation of the outer flow appears to produce a strong radial gradient in the CO and NO{sub x} emissions.
- OSTI ID:
- 72842
- Report Number(s):
- CONF-941007--; ISBN 0-7918-1383-5
- Country of Publication:
- United States
- Language:
- English
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