TY - GEN
T1 - 20 khz 3D measurements in a mach-2 cavity combustor based on tomographic chemiluminescence
AU - Lei, Qingchun
AU - Wu, Yue
AU - Xu, Wenjiang
AU - Ma, Lin
AU - Ombrello, Timothy M.
AU - Carter, Campbell D.
N1 - Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2016
Y1 - 2016
N2 - This work reports a study of the ignition processes in a Mach-2 cavity combustor using a three-dimensional (3D) diagnostic with 20 kHz temporal resolution. The diagnostic was based on a combination of tomographic chemiluminescence (TC) and fiber-based endoscopes (FBEs). Customized FBEs were employed to capture line-of-sight integrated chemiluminescence images (termed projections) of the combustor from 8 different orientations simultaneously at 20 kHz. The measured projections were then used in a tomographic algorithm to obtain 3D reconstructions of flame structures. Based on the 3D reconstructions, 3D volume of ignition kernels was extracted to further study the ignition processes. The 3D volume measurements clearly distinguished the ignition stage from the stable combustion stage of the combustor and enabled the determination of a transition time to quantify both stages. These results demonstrated the utility of the 3D diagnostics to overcome some of the limitations of established planar diagnostics and to resolve the dynamics of high-speed combustion devices both spatially and temporally.
AB - This work reports a study of the ignition processes in a Mach-2 cavity combustor using a three-dimensional (3D) diagnostic with 20 kHz temporal resolution. The diagnostic was based on a combination of tomographic chemiluminescence (TC) and fiber-based endoscopes (FBEs). Customized FBEs were employed to capture line-of-sight integrated chemiluminescence images (termed projections) of the combustor from 8 different orientations simultaneously at 20 kHz. The measured projections were then used in a tomographic algorithm to obtain 3D reconstructions of flame structures. Based on the 3D reconstructions, 3D volume of ignition kernels was extracted to further study the ignition processes. The 3D volume measurements clearly distinguished the ignition stage from the stable combustion stage of the combustor and enabled the determination of a transition time to quantify both stages. These results demonstrated the utility of the 3D diagnostics to overcome some of the limitations of established planar diagnostics and to resolve the dynamics of high-speed combustion devices both spatially and temporally.
UR - http://www.scopus.com/inward/record.url?scp=84980027714&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84980027714
SN - 9781624104381
T3 - 32nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference
SP - 1
EP - 6
BT - 32nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 32nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2016
Y2 - 13 June 2016 through 17 June 2016
ER -