TY - JOUR
T1 - Lean-Premixed, Swirl-Stabilized Flame Response
T2 - Flame Structure and Response as a Function of Confinement
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 © 2018 by ASME.
PY - 2018/3/1
Y1 - 2018/3/1
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 is shown to be the same in each confinement. The nature of the fluctuations in the mean flame position is 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 is shown to be the same in each confinement. The nature of the fluctuations in the mean flame position is 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.
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U2 - 10.1115/1.4037925
DO - 10.1115/1.4037925
M3 - Article
AN - SCOPUS:85032857493
VL - 140
JO - Journal of Engineering for Gas Turbines and Power
JF - Journal of Engineering for Gas Turbines and Power
SN - 0742-4795
IS - 3
M1 - 031504
ER -