Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
권호 표지

Study of Combustion and Emission Characteristics for DI Diesel Engine with a Swirl-Chamber

  • Liu, Yu (Dept. of Mechanical Engineering, Dong-A University) ;
  • Chung, S.S. (Dept. of Mechanical Engineering, Dong-A University)
  • Received : 2010.08.12
  • Accepted : 2010.09.27
  • Published : 2010.09.30
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Abstract

Gas motion within the engine cylinder is one of the major factors controlling the fuel-air mixing and combustion processes in diesel engines. In this paper, a special swirl-chamber is designed and applied to a DI (direct injection) diesel engine to generate a strong swirl motion thus enhancing gas motion. Compression, combustion and expansion strokes of this DI diesel engine with the swirl-chamber have been simulated by CFD software. The simulation model was first validated through comparisons with experimental data and then applied to do the simulation of the spray and combustion process. The velocity and temperature field inside the cylinder showed the influences of the strong swirl motion to spray and combustion process in detail. Cylinder pressure, average temperature, heat release rate, total amount of heat release, indicated thermal efficiency, indicated fuel consumption rate and emissions of this DI diesel engine with swirl-chamber have been compared with that of the DI diesel engine with $\omega$-chamber. The conclusions show that the engine with swirlchamber has the characteristics of fast mixture formulation and quick diffusive combustion; its soot emission is 3 times less than that of a $\omega$-chamber engine; its NO emission is 3 times more than that of $\omega$-chamber engine. The results show that the DI diesel engine with the swirl-chamber has the potential to reduce emissions.

Keywords

References

  1. M. J. Tindal, T. J. Williams and M. Aldoory, "The effect of inlet port design on cylinder gas motion in direct injection diesel engines", Flow in Internal Combustion Engines, ASME, New York, 1982, pp. 101-111.
  2. F. Brandl, I. Reverencic, W. Cartellieri and J. C. Dent, "Turbulent air flow in the combustion bowl of a DI diesel engine and its effect on engine performance", SAE paper 790040, SAE Trans., Vol. 88, 1979.
  3. Y. Shimamoto and K. Akiyama, "A study of squish in open combustion chambers of a diesel engine", JSME, Vol. 13, No.63, 1970, pp. 1096-1103. https://doi.org/10.1299/jsme1958.13.1096
  4. R. Hadef and B. Lenze, "Effects of co- and counterswirl on the droplet characteristics in a spray flame", Chemical Engineering and Processing: Process Intensification, Vol. 47, No. 12, 2008, pp. 2209-2217. https://doi.org/10.1016/j.cep.2007.11.017
  5. P. G. Hill and D. Zhang, "The effects of swirl and tumble on combustion in spark-ignition engines", Progress in Energy and Combustion Science, Vol. 20, No. 5, 1994, pp. 373-429. https://doi.org/10.1016/0360-1285(94)90010-8
  6. D. T. Li, R. Xiong and H. Xue, "Temperature measurement in the swirl chamber of an IDI engine using Moire deflectometry", Applied Thermal Engineering, Vol. 19, No. 5, 1999, pp. 543-554. https://doi.org/10.1016/S1359-4311(98)00074-X
  7. Stevan Nemoda, Vukman Bakic, Simeon Oka, Goran Zivkovic and Nenad Crnomarkovic, "Experimental and numerical investigation of gaseous fuel combustion in swirl chamber", International Journal of Heat and Mass Transfer, Vol. 48, No. 21-22, 2005, pp. 4623-4632. https://doi.org/10.1016/j.ijheatmasstransfer.2005.04.004
  8. LIU A B, MATHER D and REIYZ R D, "Modeling the Effects of Drop Drag and Breakup on Fuel Sprays", SAE Paper 930072, 1993.
  9. J Senda, M Kobayashi, S Iwashita and H Fujimoto, "Modeling of Diesel Spray Impingement on a Flat Wall", SAE Paper 941894, 1994.
  10. Kunpeng Qi, Liyan Feng, Xiabyin Leng, Baoguo Du and Wuqiang Long, "Simulation of quasi-dimensional combustion model for predicting diesel engine performance", Applied Mathematical Modelling, Vol. 35, No. 2, 2011, pp. 930-940. https://doi.org/10.1016/j.apm.2010.07.047
  11. AVL LIST GmbH, "AVL FIRE 8.2 Manual-Theory", Graz, Austria, 2003.