한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제45권6호
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  • Pages.447-454
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  • 2017
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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LES 해석에서 액체제트의 분열에 대한 확률론적 분열 모델링 비교

Stochastic Model Comparison for the Breakup and Atomization of a Liquid Jet using LES

  • Yoo, YoungLin (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Sung, Hong-Gye (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 투고 : 2017.01.31
  • 심사 : 2017.05.25
  • 발행 : 2017.06.01
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초록

난류 유동장으로 분사되는 두가지 형태의 액체 제트 (수평분사는 디젤연료와 수직분사는 물)의 액주 분열과 미립화 현상에 관한 이상(Two-phase) 유동에 대해 3차원 LES 수치해석을 수행하였다. 기체상태의 공기 유동은 오일러리안 해법을 사용하고, 액체 제트의 액적 추적은 라그랑지안 해법을 사용하여 기체-액체간 이상유동 해석을 수행하였다. 두 종류의 확률론적 분열 모델(Stochastic breakup model)을 사용하여 액적 분열을 모사하였으며, 액체제트의 침투깊이와 액적 분포(Sauter Mean Diameter)를 실험결과와 비교하여 미세하게 분열되는 액체 제트의 분열 현상에 대해 확률론적 분열 모델링의 적합성을 제시하였다.

A three-dimensional two-phase large eddy simulation(LES) has been conducted to investigate the breakup and atomization of liquid jets such as a diesel jet in parallel flow and water jet in cross flow. Gas-liquid two-phase flow was solved by a combined model of Eulerian for gas flow and Lagrangian for a liquid jet. Two stochastic breakup models were implemented to simulate the liquid column and droplet breakup process. The penetration depth and SMD(Sauter Mean Diameter) were analyzed, which was comparable with the experimental data.

키워드

참고문헌

  1. O'Rouke, P. J., and Amsden, A. A., "The TAB Method for Numerical Clculation of Spray Droplet Breakup," SAE Technical Paper 872089, 1987.
  2. Ibrahim, E. A., Yang, H. Q., and Przekwas, A. J., "Modeling of spray droplets deformation and breakup," Journal of Propulsion and Power, Vol. 9, No. 4, 1993, pp. 651-654. https://doi.org/10.2514/3.23672
  3. Reitz, R. D., "Modeling Atomization Processes in High-pressure Vaporizing Sprays," Atomisation and Spray Technology (ISSN 0266-3481), Vol. 3, No. 4, 1987, pp. 309-337.
  4. Beale, J. C., and Reitz, R. D., "Modeling spray atomization with the Kelvin-Helmholtz/Rayleigh-Taylor hybrid model," Atomization and sprays, Vol. 9, No. 6, 1999, pp 623-650. https://doi.org/10.1615/AtomizSpr.v9.i6.40
  5. Prashant. K., Wang. S., Yang. V., "Modeling of finite-size droplets and particles in multiphase flows," Chinese Journal of Aeronautics, Vol. 28, No. 4, 2015, pp 974-982. https://doi.org/10.1016/j.cja.2015.05.004
  6. Yang, S. J., Koo, J. Y., Sung, H. G., and Yang, V., "LES of Breakup and Atomization Characteristics of a Liquid Jet into Cross Turbulent Flow," The Korean Society of Propulsion Engineers, Vol. 14, No. 2, 2010, pp. 1-9.
  7. Yoo Y. L., Han, D, H,, Sung, H. G., "LES on breakup and atomization of a liquid jet into cross turbulent flow in a rectangular duct", The Korean Society of Aeronautical and space sciences, Vol. 44, No. 4, 2016, pp 290-297. https://doi.org/10.5139/JKSAS.2016.44.4.290
  8. Apte, S. V., Gorokhovski, M. A., and Moin, P., "LES of atomizing spray with stochastic modeling of secondary breakup," International Journal of Multiphase Flow, Vol. 29, No. 9, 2003, pp. 1503-1522. https://doi.org/10.1016/S0301-9322(03)00111-3
  9. Gorokhovski, M. A., and Saveliev, V. L., "Analyses of Kolmogorov's model of breakup and its application into Lagrangian computation of liquid sprays under air-blast atomization," Physics of Fluids, Vo. 15, No. 1, 2003, pp. 184-192. https://doi.org/10.1063/1.1527914
  10. Vinkovic, I., Aguirre, C., Simoens S., and Gorokhovski, M., "Large Eddy Simulation of Droplet Dispersion for Inhomogeneous Turbulent Wall Flow," International Journal of Multiphase Flow, Vol. 32, 2006, pp.344-364 https://doi.org/10.1016/j.ijmultiphaseflow.2005.10.005
  11. Gorokhovski, M. A., and Saveliev, V. L., "Statistical universalities in fragmentation under scaling symmetry with a constant frequency of fragmentation," Journal of Physics D: Applied Physics, Vol. 41, No. 8, 2008, 085405. https://doi.org/10.1088/0022-3727/41/8/085405
  12. Gorokhovski, M. A., Jouanguy, J., and Chtab-Desportes, A., "Stochastic model of the near-to-injector spray formation assisted by a high-speed coaxial gas jet," Fluid dynamics research, Vol. 41, No. 3, 2009, 035509. https://doi.org/10.1088/0169-5983/41/3/035509
  13. Bini, M., and Jones, W. P., "Particle acceleration in turbulent flows: A class of nonlinear stochastic models for intermittency," Physics of Fluids, Vol. 19, No. 3, 2007, 035104. https://doi.org/10.1063/1.2709706
  14. Bini, M. and Jones W. P., "Large-Eddy Simulation of Particle-Laden Turbulent Flows," J. Fluid Mech. 614, 2008, pp.207-252 https://doi.org/10.1017/S0022112008003443
  15. Bini, M., Jones, W. P., and Lettieri. C., "Large eddy simulation of spray atomization with stochastic modelling of breakup." Proceedings of the European Combustion Meeting, Vol. 22, No. 11, 2009.
  16. Jones, W. P., and Lettieri, C., "Large eddy simulation of spray atomization with stochastic modeling of breakup," Physics of Fluids, Vol. 22, No. 11, 2010, 115106. https://doi.org/10.1063/1.3508353
  17. Jones, W. P., Marquis, A. J., and Noh. D., "A stochastic modelling for LES of a two-phase combusting flow," 7th European Combustion Meeting, 2015.
  18. Germano, M., Piomelli, U., Moin, P., and Cabot, W. H., "A Dynamic Sub-scale Eddy Viscosity Model," Physics of Fluids 3, 1991, pp.1760-1765 https://doi.org/10.1063/1.857955
  19. Young-Lin, Y. et al. "A large eddy simulation of the breakup and atomization of a liquid jet into a cross turbulent flow at various spray conditions." International Journal of Heat and Mass Transfer, Vol. 112, 2017, pp. 97-112. https://doi.org/10.1016/j.ijheatmasstransfer.2017.04.064
  20. Hiroyasu, M., Kadota, T., "Fuel droplet size distrubution in diesel combustion chamber," SAE Tec. Paper 74071, 1974.
  21. Stenzler, J. N., and Lee, J. G., "Penetration of liquid jets in a crossflow," AIAA 2003-1327, 2003.
  22. Wu, P. K., Kirkendall, K. A., Fuller, R. P., and Najad, A. S., "Spray Trajectories of Liquid Fuel Jets in subsonic Crossflows," 7th International Conference on Liquid Atomization and Spray Systems, 1997, pp. 545-552.
  23. Mashayek, A., "Experimental and numerical study of liquid jets in crossflow," Master's Dissertation, Toronto Universiry, 2006.