Evaluation of Combustion Mechanism of Droplet Cluster by Simultaneous Time-Series Measurement in Premixed Spray Flame

Seung-Min Hwang; Fumiteru Akamatsu; Hyun-Seo Park

Journal of Industrial and Engineering Chemistry, Vol.13, No.2, 206-213, March, 2007

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Evaluation of Combustion Mechanism of Droplet Cluster by Simultaneous Time-Series Measurement in Premixed Spray Flame

Seung-Min Hwang, Fumiteru Akamatsu¹, and Hyun-Seo Park^{2, †}

Plant Engineering Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), 2-6-1Nagasaka, Yokosuka, Kanagawa 240-0196, Japan
¹Department of Mechanical Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
²Department of Environmental System Engineering, Jeonju University, 560-735, Korea

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To evaluate the detailed combustion mechanism of droplet clusters, that is, group combustion behavior, we investigated the OH chemiluminescence, CH band light emission, and Mie scattering from droplets illuminated by laser light sheet, and also measured the droplet diameters and velocities using a Cassegrain optics named MICRO (Multi-color Integrated Cassegrain Receiving Optics) and Phase Doppler Anemometer (PDA), respectively. Moreover, time-series planar images of droplet clusters were obtained simultaneously with these five quantities to observe the combustion process of droplet clusters. We examined the transition of the group combustion mode of droplet clusters as a function of the distance from the burner port using the modified group combustion number GC. We found that the combustion mode of some, but not all, clusters corresponds to the combustion mode defined by Chiu and coworkers. The reason for the disagreement is probably due to the fact that the group combustion number was only estimated with respect to the geometrical arrangement of the droplets in a cluster, and the shape of droplet cluster is based on the three-dimension.

Keywords:premixed spray flame;group combustion;droplet cluster;light emission;simultaneous time-series measurement

[References]

Akamatsu F, Ph. D. Thesis, Osaka University (1996)
Jung KY, Kim EJ, Kang YC, J. Ind. Eng. Chem., 11(2), 280 (2005)
Nakamura M, Akamatsu F, Kurose R, Katsuki M, Phys. Fluids, 17, 123301 (2005)
Watanabe H, Kurose R, Hwang SM, Akamatsu F, Combust. Flame, in press (2006)
Chiu HH, Liu TM, Combust. Sci. Technol., 17, 127 (1977)
Chiu HH, Kim HY, Croke EJ, Proc. Combust. Inst., 19, 971 (1982)
Akamatsu F, Nakabe K, Mizutani Y, Katsuki M, Trans. Jpn. Soc. Mech. Eng., (in Japanese), 60, No. 577, B, 3172-3178 (1994)
Akamatsu F, Mizutani Y, Katsuki M, Tsushima S, Cho YD, Proc. Combust. Inst., 26, 1723 (1996)
Akamatsu F, Mizutani Y, Katsuki M, Tsushima S, Cho YD, Trans. Jpn. Soc. Mech. Eng., (in Japanese), 62, No. 596, B, 1622-1628 (1996)
Tsushima S, Saitoh H, Akamatsu F, Katsuki M, JSME Int. J., 44, No. 4, B, 616-623 (2001)
Hwang SM, Ph. D. Thesis, Osaka University, (in Japanese) (2005)
Wakabayashi T, Akamatsu F, Katsuki M, Mizutani Y, Ikeda Y, Kawahara N, Nakajima T, Trans, Jpn. Soc. Mech. Eng., (in Japanese), 64, No. 619, B, 925-930 (1998)
Akamatsu F, Wakabayashi T, Tsushima S, Katsuki M, Mizutani Y, Ikeda Y, Kawahara N, Nakajima T, Meas. Sci. Technol., 10, 1240 (1999)
Wakabayashi T, Akamatsu F, Katsuki M, Mizutani Y, Ikeda Y, Kawahara N, Nakajima T, Trans. Jpn. Soc. Mech. Eng., (in Japanese), 64, No. 619, B, 925-930 (1998)
Chiu HH, Proc. Combus. Inst., 28, 1095 (2000)

[1] Akamatsu F, Ph. D. Thesis, Osaka University (1996)

[2] Jung KY, Kim EJ, Kang YC, J. Ind. Eng. Chem., 11(2), 280 (2005)

[3] Nakamura M, Akamatsu F, Kurose R, Katsuki M, Phys. Fluids, 17, 123301 (2005)

[4] Watanabe H, Kurose R, Hwang SM, Akamatsu F, Combust. Flame, in press (2006)

[5] Chiu HH, Liu TM, Combust. Sci. Technol., 17, 127 (1977)

[6] Chiu HH, Kim HY, Croke EJ, Proc. Combust. Inst., 19, 971 (1982)

[7] Akamatsu F, Nakabe K, Mizutani Y, Katsuki M, Trans. Jpn. Soc. Mech. Eng., (in Japanese), 60, No. 577, B, 3172-3178 (1994)

[8] Akamatsu F, Mizutani Y, Katsuki M, Tsushima S, Cho YD, Proc. Combust. Inst., 26, 1723 (1996)

[9] Akamatsu F, Mizutani Y, Katsuki M, Tsushima S, Cho YD, Trans. Jpn. Soc. Mech. Eng., (in Japanese), 62, No. 596, B, 1622-1628 (1996)

[10] Tsushima S, Saitoh H, Akamatsu F, Katsuki M, JSME Int. J., 44, No. 4, B, 616-623 (2001)

[11] Hwang SM, Ph. D. Thesis, Osaka University, (in Japanese) (2005)

[12] Wakabayashi T, Akamatsu F, Katsuki M, Mizutani Y, Ikeda Y, Kawahara N, Nakajima T, Trans, Jpn. Soc. Mech. Eng., (in Japanese), 64, No. 619, B, 925-930 (1998)

[13] Akamatsu F, Wakabayashi T, Tsushima S, Katsuki M, Mizutani Y, Ikeda Y, Kawahara N, Nakajima T, Meas. Sci. Technol., 10, 1240 (1999)

[14] Wakabayashi T, Akamatsu F, Katsuki M, Mizutani Y, Ikeda Y, Kawahara N, Nakajima T, Trans. Jpn. Soc. Mech. Eng., (in Japanese), 64, No. 619, B, 925-930 (1998)

[15] Chiu HH, Proc. Combus. Inst., 28, 1095 (2000)