TY - GEN
T1 - Lean-premixed, swirl-stabilized flame response
T2 - ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
AU - De Rosa, Alexander J.
AU - Peluso, Stephen J.
AU - Quay, Bryan D.
AU - Santavicca, Domenic A.
N1 - Funding Information:
The authors would like to thank Mr. L. Horner who fabricated the test facility used in this study. This work has been partially supported by General Electric (GE) Power.
Publisher Copyright:
Copyright © 2017 ASME.
PY - 2017
Y1 - 2017
N2 - The effect of confinement (flame-wall interactions) on the response of a turbulent, swirl-stabilized flame is experimentally examined, with a focus on the shape and structure of these flames. A series of three cylindrical combustors of 0.11, 0.15 and 0.19 m diameter are used to vary the degree of confinement experienced by the flame. Using CH∗ chemiluminescence images, the shape of the flame in each combustor is described. These images are then further analyzed and reveal marked similarities in the geometry and location of these flames in a defined 'flame base' region near the combustor inlet. This similarity in location of the flame base leads to a similarity in the response of this portion of the flame to imposed oscillations. In particular, the phase of the fluctuations in this region are shown to be the same in each confinement. The nature of the fluctuations in the mean flame position are also shown to be similar in each confinement. These results indicate that the geometry of the flame in the base region is not a function of confinement and that the flames are responding to the same convective mechanisms, and in the same manner, in this region of the flame.
AB - The effect of confinement (flame-wall interactions) on the response of a turbulent, swirl-stabilized flame is experimentally examined, with a focus on the shape and structure of these flames. A series of three cylindrical combustors of 0.11, 0.15 and 0.19 m diameter are used to vary the degree of confinement experienced by the flame. Using CH∗ chemiluminescence images, the shape of the flame in each combustor is described. These images are then further analyzed and reveal marked similarities in the geometry and location of these flames in a defined 'flame base' region near the combustor inlet. This similarity in location of the flame base leads to a similarity in the response of this portion of the flame to imposed oscillations. In particular, the phase of the fluctuations in this region are shown to be the same in each confinement. The nature of the fluctuations in the mean flame position are also shown to be similar in each confinement. These results indicate that the geometry of the flame in the base region is not a function of confinement and that the flames are responding to the same convective mechanisms, and in the same manner, in this region of the flame.
UR - http://www.scopus.com/inward/record.url?scp=85029281958&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029281958&partnerID=8YFLogxK
U2 - 10.1115/GT201763476
DO - 10.1115/GT201763476
M3 - Conference contribution
AN - SCOPUS:85029281958
T3 - Proceedings of the ASME Turbo Expo
BT - Combustion, Fuels and Emissions
PB - American Society of Mechanical Engineers (ASME)
Y2 - 26 June 2017 through 30 June 2017
ER -