Effects of operating pressure on flame oscillation and emission characteristics in a partially premixed swirl combustor

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Experimental Thermal and Fluid Science

DOI:https://doi.org/10.1016/J.EXPTHERMFLUSCI.2010.08.016· OSTI ID:21390718

Kim, Jong-Ryul ^[1]; Choi, Gyung-Min; Kim, Duck-Jool ^[2]

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1. Graduate School, Department of Mechanical Engineering, Pusan National University (Korea, Republic of)
2. School of Mechanical Engineering, Pusan National University (Korea, Republic of)

The influence of varying combustor pressure on flame oscillation and emission characteristics in the partially premixed turbulent flame were investigated. In order to investigate combustion characteristics in the partially premixed turbulent flame, the combustor pressure was controlled in the range of -30 to 30 kPa for each equivalence ratio ({phi} = 0.8-1.2). The r.m.s. of the pressure fluctuations increased with decreasing combustor pressure for the lean condition. The combustor pressure had a sizeable influence on combustion oscillation, whose dominant frequency varied with the combustor pressure. Combustion instabilities could be controlled by increasing the turbulent intensity of the unburned mixture under the lean condition. An unstable flame was caused by incomplete combustion; hence, EICO greatly increased. Furthermore, EINO{sub x} simply reduced with decreasing combustor pressure at a rate of 0.035 g/10 kPa. The possibility of combustion control on the combusting mode and exhaust gas emission was demonstrated. (author)

• OSTI ID: 21390718
• Journal Information: Experimental Thermal and Fluid Science, Journal Name: Experimental Thermal and Fluid Science Journal Issue: 1 Vol. 35; ISSN 0894-1777; ISSN ETFSEO
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
COMBUSTION
COMBUSTION CONTROL
COMBUSTION INSTABILITY
COMBUSTORS
Combustion oscillation
EMISSION
FLAMES
FLUCTUATIONS
OSCILLATIONS
PRESSURE DEPENDENCE
PRESSURE RANGE KILO PA
Partially premixed turbulent flames
TURBULENCE