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Proceedings Paper

Diode laser absorption tomography for swirl flames application
Author(s): Fei Li; Guojian Kang; Xin Lin; Kuanliang Wang; Xilong Yu
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Paper Abstract

Tunable Diode Laser Absorption Spectroscopy (TDLAS) has been one of the most powerful techniques for combustion diagnostics in different kinds of burners. Combined with Hyperspectroscopy Tomography (HT), TDLAS can improve its spatial solution. This study reports a TDLAS-tomography system and its application in a swirl burner. The diagnostics system composed of sixteen beams (13X13, 13 parallel beams and 13 vertical 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. Dynamic data was obtained during the ignition of hydrogen fuel at the exit of the scramjet combustor. T and PX distribution of cross section indicate the flame location and its intensity. Successful experiments show great performance of this diagnostic method.

Paper Details

Date Published: 29 March 2019
PDF: 7 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 1104633 (29 March 2019); doi: 10.1117/12.2524472
Show Author Affiliations
Fei Li, Institute of Mechanics (China)
Guojian Kang, China Academy of Aerospace Aerodynamics (China)
Xin Lin, Institute of Mechanics (China)
Kuanliang Wang, Institute of Mechanics (China)
China Academy of Aerospace Aerodynamics (China)
Xilong Yu, Institute of Mechanics (China)
China Academy of Aerospace Aerodynamics (China)

Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)

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