Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

Best Paper Award Selection - Editorial Board Site

2002, Volume9

Issue 2&3

174 pages

Issue price - $280.00

Sze Man Simon Chan
Department of Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065, Japan

Shuichi Torii
Department of Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065; and Department of Mechanical Engineering and Materials Science, Kumamoto University 2-39-1, Kurokami, Kumamoto, 860-8555, JAPAN

Toshiaki Yano
Department of Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065, Japan

T. Sameshima
Department of Mechanical Engineering, Kagoshima University 1-21-40, Korimoto, Kagoshima, 890-0065, Japan

Experiments are conducted to investigate the effect of a proposed combustion technique, namely annular counterflow, on jet diffusion flame blowout limit extension. Annular counterflow is formed in a concentric annulus, in which a fuel jet is ejected from a nozzle and air is sucked into an outer cylinder encompassing the nozzle. Normal video filming, schlieren technique and image processing devices are employed to record and visualize sundry flame morphologies triggered by this technique. Results show that the preponderant factor governing such an extension is the air-suction momentum flux.

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