Abstract
The transient atomization characteristics of a single-hole diesel spray were investigated to clarify the time-dependent droplet formation process of the spray through time-resolved analysis of the droplet size data acquired by using a 2-D PDPA (phase Doppler particle analyzer). Comparisons among the three single-hole diesel nozzles on the atomization characteristics were made to confirm the effects of the hole-diameter. The hole diameter of the single-hole diesel nozzles varied with dn=0.22, 0.32 and 0.42 mm. The time-resolved diameter, SMD (Sauter mean diameter) and AMD (arithmetic mean diameter) of droplets in diesel spray injected into still ambient air were measured. The SMD and AMD decreased with decreasing nozzle hole diameter. The SMD distribution along the spray centerline steeply decreased with increasing axial distance before reaching a constant value. In the time-dependent analysis of the SMD of the whole flow field, the SMD gradually increased with time after the initiation of injection, reached a maximum value, and then decreased.
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References
Arcoumanis, C., Chang, J. C. and Morris, T. (1993). Spray characteristics of single-and two-spring diesel fuel injectors. SAE Paper No. 930922.
Arcoumanis, C., Cossali, E., Paal, G. and Whitelaw, J. H. (1990). Transient characteristics of multi-hole diesel sprays. SAE Paper No. 900480.
Doudou, A. and Maslouhi, A. (2007). A macro-microscopic investigation of high-pressure sprays injected by a common rail system. J. Mechanical Science and Technology 21,8, 1284–1292.
Hiroyasu, H., Arai, M. and Tabata, M. (1989) Empirical equations for the sauter mean diameter of a diesel spray. SAE Paper No. 890464.
Hosoya, H. and Obokata, T. (1993). Effect of nozzle configuration on characteristics of steady-state diesel spray. SAE Paper No. 930593.
Ikeda, Y., Hosokawa, S., Sekihara, F. and Nakajima, T. (1997). Cycle-resolved PDA measurement of size-classified spray structure of air-assist injector. SAE Paper No. 970631.
Ismailov, M., Ishima, T., Obokata, T., Tsukagoshi, M. and Kobayashi, K. (1999). Visualization and measurements of sub-millisecond transient spray dynamics applicable to direct injection gasoline engine (Part 2: PDA Measurements and analysis of instantaneous spray patterns). JSME Int. J., Series B 42,1.
Koo, J. Y. and Martin, J. K. (1990). Droplet size and velocities in a transient diesel fuel spray. SAE Paper No. 900397.
Lee, S. H., Jeong, D. Y., Lee, J. T., Ryou, H. S. and Hong, K. (2005). Investigation on spray characteristics under ultra-high injection pressure conditions. Int. J. Automotive Technology 6,2, 125–131.
Lee, S. Y. and Ryu, S. U. (2006). Recent progress of spraywall interaction research. J. Mechanical Science and Technology 20,8, 1101–1117.
Park, S. W., Suh, H. K. and Lee, C. S. (2005). Effects of a split injection on spray characteristics for a common-rail type diesel injection system. Int. J. Automotive Technology 6,4, 315–322.
Pitcher, G. and Wigley, G. (1992). A study of the breakup and atomization of a combusting diesel fuel spray by phase doppler anemometer. 6th Int. Symp. Application of Laser Technique to Fluid Mechanics, Lisbon, Portugal.
Reitz, R. D. and Diwakar, R. (1987). Structure of high pressure fuel sprays. SAE Paper No. 870598.
Safman, M., Fraidl, G. K. and Wigley, G. (1988). Application of phase and laser doppler anemometer to the measurement of droplet size and velocity in gasoline and diesel fuel injection system. 6th Int. Symp. Application of Laser Technique to Fluid Mechanics, Lisbon, Portugal.
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Kim, D.J., Lee, J.K. Analysis of the transient atomization characteristics of diesel spray using time-resolved PDPA data. Int.J Automot. Technol. 9, 297–305 (2008). https://doi.org/10.1007/s12239-008-0036-3
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DOI: https://doi.org/10.1007/s12239-008-0036-3