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Proceedings Paper

Flame behaviors of propane/air premixed flame propagation in a closed rectangular duct with a 90-deg bend
Author(s): Xuechao He; Jinhua Sun; K. K. Yuen; Yibin Ding; Sining Chen
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Paper Abstract

Experiments of flame propagation in a small, closed rectangular duct with a 90° bend were performed for a propane-air mixture. The high speed camera and Schlieren techniques were used to record images of flame propagation process in the combustion pipe. Meanwhile, the fine thermocouples and ion current probes were applied to measure the temperature distribution and reaction intensity of combustion. The characteristics of propane-air flame and its microstructure were analyzed in detail by the experimental results. In the test, the special tulip flame formation was observed. Around the bend, the flame tip proceeded more quickly at the lower side with the flame front elongated toward the axial direction. And transition to turbulent flame occurred. It was suggested that fluctuations of velocity, ion current and temperature were mainly due to the comprehensive effects of multi-wave and the intense of turbulent combustion.

Paper Details

Date Published: 10 February 2009
PDF: 7 pages
Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71260P (10 February 2009); doi: 10.1117/12.822049
Show Author Affiliations
Xuechao He, Univ. of Science and Technology of China (China)
Jinhua Sun, Univ. of Science and Technology of China (China)
K. K. Yuen, City Univ. of Hong Kong (Hong Kong, China)
Yibin Ding, Univ. of Science and Technology of China (China)
Sining Chen, China Academy of Safety Sciences and Technology (China)

Published in SPIE Proceedings Vol. 7126:
28th International Congress on High-Speed Imaging and Photonics
Harald Kleine; Martha Patricia Butron Guillen, Editor(s)

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