IMECH-IR  > 高温气体动力学国家重点实验室
Heat release and temperature diagnostics for swirling flames using chemiluminescence and absorption tomography
Lin X(林鑫)1; Wang KL(王宽亮)1,2; Li F(李飞)1; Yu XL(余西龙)1,2
Source Publication12th Asia-Pacific Conference on Combustion, ASPACC 2019
2019
Conference Name12th Asia-Pacific Conference on Combustion, ASPACC 2019
Conference DateJuly 1, 2019 - July 5, 2019
Conference PlaceFukuoka, Japan
Abstract

A laboratory-scale gas turbine model combustor fueled with methane is studied experimentally with the help of three-dimensional computed tomography of chemiluminescence (3D-CTC) and tunable diode laser absorption tomography (TDLAT). In the combustion structure transition, the three-dimensional relative emissions of CH* were measured and taken as qualitative indicators of the heat release rate. This 3D measurement method utilizes 8 multi-directional CH* images as inputs combined with tomographic algorithms to compute the 3D distribution of CH* intensities. The TDLAT system composed of 42 beams (21×21, 21 parallel beams and 21vertical beams). Four water vapor absorption lines, 7185.6 cm-1, 7444.3 cm-1, 7466.3 cm-1, and 6807.8 cm-1, were utilized in each beam using time-division-multiplexed (TDM) method at total measuring frequency of 2.5 kHz. A reconstruction routine based on simulated-annealing algorithm was used to deduce distributions of temperature T and water partial pressure PX. Various lean operating conditions were conducted to examine the impact of flow velocity on heat release rate oscillation and spatial structure transition with an overall equivalence ratio of about 0.65 and dump plane velocity of 2.9-18.3 m/s. During the increase of Reynolds number, the heat release zone and high temperature zone changing obviously along the nozzle radial and axis direction, and the largest heat release plane moves forward significantly.

Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80035
Collection高温气体动力学国家重点实验室
Corresponding AuthorLi F(李飞)
Affiliation1.State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, CAS Beisihuanxi Road, Beijing; 100190, China
2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing; 100049, China
Recommended Citation
GB/T 7714
Lin X,Wang KL,Li F,et al. Heat release and temperature diagnostics for swirling flames using chemiluminescence and absorption tomography[C]12th Asia-Pacific Conference on Combustion, ASPACC 2019,2019.
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