TY - CONF
T1 - Influence of drop spacing on burning of an emulsified-drop stream
AU - Lin, Y. Y.
AU - Chen, C. K.
AU - Lin, T. H.
N1 - Funding Information:
This work was supported by the National Science Council, Taiwan, under contract NSC99-2221-E-006-081-MY3 and NSC101-3113-P-006-010. References [1] Law, C.K., Progress in Energy and Combustion Science 8: 171–201 (1982). [2] Law C.K., Combustion Physics, New York: Cambridge University Press, 2006. [3] Kadota, T., and Yamasaki, H., Progress in Energy and Combustion Science 28: 385–404 (2002). [4] Sirignano W. A., Fluid Dynamics and Transport of Droplets and Sprays, New York: Cambridge University Press, 2010. [5] Avedisian, C. T. and Anders, P. R., Journal of Colloid and Interface Science 64-3: 438-453 (1977). [6] Wang, C. H. and Law, C. K., Combustion and Flame 59: 53-62 (1985). [7] Wang, C. H. and Chen, J. T., International Communications in Heat and Mass Transfer 23-6: 823-834 (1996). [8] Tsue, M., Kadota, T., Segawa, D., and Yamasaki, H., Proceedings of the Combustion Institute 26:1629– 1635 (1996). [9] Tsue, M., Yamasaki, H., Kadota, T., Segawa, D., and Kono, M., Proceedings of the Combustion Institute 27-2: 2587–2593 (1998). [10]Kadota, T., Tanaka, H., Segawa, D., and Nakaya, S., Proceedings of the Combustion Institute 31-2: 2125– 2131 (2007). [11]J. J. Sangiovanni, and A. S. Kesten, Proceedings of the Combustion Institute 16: 577-592 (1977). [12]J. J. Sangiovanni, and M. Labowsky, Combustion and Flame 47: 15-30 (1982). [13]Shaw, B. D. Dwyer, H. A. and Wei, J. B. Combustion Science and Technology 174: 29-50 (2002). [14]Castanet, G. Lebouche, M. and Lemoine, F., International Journal of Heat and Mass Transfer 48-16: 3261-3275 (2005). [15]Depredurand, V. Castanet, G. and Lemoine, F., International Journal of Heat and Mass Transfer 53-17-18: 3495-3502 (2010). [16]Miyasaka, K. and Law, C. K., Proceedings of the Combustion Institute 18: 283–292 (1981). [17]Xiong, T. Y. Law, C. K. and Miyasaka, K., Proceedings of the Combustion Institute 20: 1781–1787 (1985). [18]Cho, C. P. Kim, H. Y. and Yoon, S. S., Combustion and Flame 156: 14–24 (2009). [19]Lee, D. Kim, H. Y. Yoon, S. S. and Cho, C.P., Fuel 89: 1447–1460 (2010). [20]Chen, C. K. and Lin, T. H., Combustion and Flame 159-5: 1971–1979 (2012). [21]Lin, Y. Y., Chen, C. K., Lin, J. C., and Lin, T. H., ILASS-Asia 15: 169-175 (2011). [22]Segawa, D., Kadota, T., Kohama, R., and Enomoto, H., Proceedings of the Combustion Institute 28: 961– 968 (2000).
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© ICLASS 2012 - 12th Inte. Con. on Liquid Atom. and Spray Systems. All rights reserved.
PY - 2012
Y1 - 2012
N2 - Combustion characteristics of water-in-dodecane emulsion drops with various initial spacings were studied experimentally by using a free-falling drop burning apparatus. The initial drop spacings (Si) were 2.5, 5, 10, 40, 75 (70), 100. Si(s/di) was defined as the ratio of the drop center-to-center distance (s) to the initial drop diameter (di). The water content (β) and the oxygen concentration (ΩO2) were fixed at 5% and 21%, while two drop sizes 550 μm and 450 μm were compared. The results showed that the transition of the drop flame occurred for all cases in the experiment. For Si> 10 along the flow direction, the flame around the drops would change from a blue spherical flame to a yellow flame and a wake flame, and the drop flame extinguished later in the downstream region. Soot particles was generated and drops collision and merging occurred to form a flame tube for Si=2.5 in both cases of di= 550 μm and 450 μm. Besides, drop expansion was observed in both cases of di= 550 μm and di= 450 μm, while micro-explosion only occurred in the far downstream region for Si= 40, di= 450 μm. It was also shown that the emulsion drop evaporation rate was not a constant, and the trend of the drop evaporation rate was strongly influenced by changing the initial drop size.
AB - Combustion characteristics of water-in-dodecane emulsion drops with various initial spacings were studied experimentally by using a free-falling drop burning apparatus. The initial drop spacings (Si) were 2.5, 5, 10, 40, 75 (70), 100. Si(s/di) was defined as the ratio of the drop center-to-center distance (s) to the initial drop diameter (di). The water content (β) and the oxygen concentration (ΩO2) were fixed at 5% and 21%, while two drop sizes 550 μm and 450 μm were compared. The results showed that the transition of the drop flame occurred for all cases in the experiment. For Si> 10 along the flow direction, the flame around the drops would change from a blue spherical flame to a yellow flame and a wake flame, and the drop flame extinguished later in the downstream region. Soot particles was generated and drops collision and merging occurred to form a flame tube for Si=2.5 in both cases of di= 550 μm and 450 μm. Besides, drop expansion was observed in both cases of di= 550 μm and di= 450 μm, while micro-explosion only occurred in the far downstream region for Si= 40, di= 450 μm. It was also shown that the emulsion drop evaporation rate was not a constant, and the trend of the drop evaporation rate was strongly influenced by changing the initial drop size.
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M3 - Paper
AN - SCOPUS:85091979275
T2 - 12th International Conference on Liquid Atomization and Spray Systems, ICLASS 2012
Y2 - 2 September 2012 through 6 September 2012
ER -