Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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A Numerical Study on the Spray-to-Spray Impingement System

  • Lee, Seong-Hyuk (Post-doctor Researcher, Turbo and Power Machinery Research Center, Seoul National University) ;
  • Ko, Gwon-Hyun (Ph.D. Candidate, Department of Mechanical Engineering, Chung-Ang University) ;
  • Ryou, Hong-Sun (Professor, Department of Mechanical Engineering, Chung-Ang university)
  • Published : 2002.02.01
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Abstract

The present article aims to perform numerical calculations for inter-spray impingement of two diesel sprays under a high injection pressure and to propose a new hybrid model for droplet collision on the basis of literature findings. The hybrid model is compared with the original O'Rourke's model, which has been widely used for spray calculations. The main difference between the hybrid model and the O'Rourke's model is mainly in determination of the collision threshold condition, in which the preferred directional effect of droplets and a critical collision radius are included. The Wave model involving the cavitation effect inside a nozzle is used for predictions of atomization processes. Numerical results are reported for different impingement angles of 60°and 90°in order to show the influence of the impinging angle on spray characteristics and also compared with experimental data. It is found that the hybrid model shows slightly better agreement with experimental data than the O'Rourke's model.

Keywords

References

  1. Allocca, L., Belardini, P., Bertoli, C., Corcione, F.E. and De Angelis, F., 1992, Experimental and numerical analysis of a diesel spray, Society of Automotive Engineering Paper 920576
  2. Arai, M. and Saito, M., 1999, Atomization Characteristics of Jet-to-Jet and Spray-to-Spray Impingement Systems, Atomization and Sprays, Vol. 9, pp. 399-417 https://doi.org/10.1615/AtomizSpr.v9.i4.60
  3. Bai, C., 1996, Modeling of Spray Impingement Processes, Ph. D. Thesis Imperial college of Science and Technology and Medicine, Department of Mechanical Engineering, University of London
  4. Brazier-Smith, P.R., Jennigs, S.G. and Latham, J., 1972, The Interaction of Falling Water Drops:Coalescence, Proceedings of Royal Society of London A., Vol. 326, pp. 393-408
  5. Brenn, G., Kalenderski, St. and Ivanov, I., 1997, Investigaiton of the Stochastic Collisions of Drops Produced by RAyleigh Breakup of Two Laminar Liquid Jets, Physics of Fluids, Vol. 9, pp. 349-364 https://doi.org/10.1063/1.869236
  6. Chiba, T, Saito, M., Amagai, K. and Arai, M., 2000, Inter-Spray Impingement of Two Diesel Sprays, ICLASS2000, CA, USA, July
  7. Gavaises, M., 1997, Modeling of Diesel fuel Injection Processes, Ph.D.Thesis, Imperial College of Science and Technology and Medicine, Department of Mechanical Engineering, University of London
  8. Gosman, A.D. and Ioannides, E., 1983, Aspects of Computer Simulation of Liquid-Fuelled combustors, Energy, Vol. 7, No. 6, pp. 482-490 https://doi.org/10.2514/3.62687
  9. Lee, S.H. and Ryou, H.S., 2000, Comparison of Spray/Wall Impingement Models with Experimental Data, J. of Propulsion and Power, Vol. 16, No. 6, pp. 939-945 https://doi.org/10.2514/2.5680
  10. Nordin, N., 2000, Complex Chemistry Modeling of Diesel Spray Combustion, Ph. D. Thesis, Chalmers University of Technology, Sweden
  11. O'Rourke, P.J., 1981, Collective Drop Effects on Vaporizing Liquid Sprays, Ph. D. Thesis, Mechanical and Aerospace Engineering, Princeton University, USA
  12. Orme, M., 1997, Experiments on Droplet Collisions, Bounce, Coalescence and Dispersion, Prog. Energy Combustion Sci., 23, pp. 65-79 https://doi.org/10.1016/S0360-1285(97)00005-1
  13. Reitz, R.D. and Diwakar, R., 1986, Effect of Drop Breakup on Fuel Sprays, Society of Automotive Engineers Paper 860469
  14. Reitz, R.D., 1987, Modeling atomization processes in high-pressure vaporizing sprays, Atomization and Spray Technology, pp. 309-337
  15. Reynolds, W.C., 1980, Modeling of Fluid Motions in Engines and Introductory Overview, Combustion Modeling in Reciprocating Engines, Ed. Mattavi, J.N. and Amann, C.A., Plenum Press, NY
  16. Sarre, C.K., Kong, S.C. and Reitz, R.D., 1999, Modeling the Effects of Injector Nozzle Geometry on Diesel Sprays, Society of Automotive Engineeris Paper 1999-01-0912
  17. Yurteri, C.U., Kadambi, J.R. and Arik, E., 1993, Spray Characterization and Droplet Interactions Study Using Particle Dynamic Analyzer, Proceeding of 5th Int. Conf. On Laser Anemometry, Advances and Applications, pp. 145-152 https://doi.org/10.1117/12.150498