Journal of Advanced Marine Engineering and Technology

  • 제28권7호
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  • Pages.1123-1130
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  • 2004
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
권호 표지

대형 디젤 엔진의 연료 분사 노즐 형상이 NOx 발생량 및 연료소비율에 미치는 영향 연구

A Study on the Optimization of Fuel Injection Nozzle Geometry for Reducing NOx Emission in a Large Diesel Engine

  • 김기두 (현대중공업 산업기술연구소 엔진연구실) ;
  • 하지수 (현대중공업 산업기술연구소 엔진연구실) ;
  • 윤욱현 (현대중공업 산업기술연구소 엔진연구실)
  • 발행 : 2004.11.01
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초록

Numerical simulations have been carried out to investigate the effect of nozzle hole geometry on the combustion characteristics of the large diesel engine. 6S90MC-C. Spray and combustion phenomena were examined numerically using FIRE code. Wane breakup and Zeldovich models were adopted to describe the atomization characteristics and NOx formation processes. Predictions on the cylinder peak pressure and NOx emission were first verified with the experimental data to confirm the reliability of numerical calculations. The comparison results showed good agreements within the range of 0.64% and 4.6% respectively. Finally, the effects of fuel spray angle and diameter on the engine performance were investigated numerically to find the optimum nozzle hole geometry considering fuel consumption, NOx emission and heat flux of the combustion chamber wall. It was concluded that the combustion gas recirculation in cylinder by changing fuel injection direction is an effective method to reduce NOx emission by about 10% with increasing fuel oil consumption, 1.4% in a large diesel engine.

키워드

참고문헌

  1. Reitz, R. D., 'Modeling Atomization processes in High-Pressure Vaporizing Sprays,' Atomization and Spray Technology, vol. 3, 1987, pp. 309-33
  2. Reitz, R.D. and Diwakar, R., 'Structure of High-Pressure Fuel Sprays,' SAE paper 870598, 1987
  3. Kim, J. Y., Yoon. W.H. and Ha, J.S., 'A Study on the Numerical Prediction of Heat Release Rate and NOx Production in Medium-Speed Marine Diesel Engines,' ASME ICED/RTD Fall Technical Conference, Erie, Pennsylvania, 2003, p. 137
  4. Senda, J., Kobayashi, M., Iwashita, S., and Fujimoto, H., 'Modeling on Diesel Spray Impinging on Flat Wall,' Int. symposium COMODIA 94, 1994, pp. 411-416
  5. Senda, J., Kobayashi, M., Iwashita, S., and Fujimoto, H., 'Modeling of Diesel Spray Impingement on a Flat Wall,' SAE paper 941894, 1994
  6. Schiller, L. and Naumann, A. Z., VDI 77, 1993, pp. 318-320
  7. Dukowicz, J.K., 'Quasi-steady droplet change in the presence of convection, informal report Los Alsmos Scientific Laboratory,' LA7997-MS
  8. Dukowicz. J. K., 'A Particle-Fluid Numerical Model for Liquid Spray,' J. Compo. Physics, vol. 35, 1980, pp. 229-253
  9. Theobald, M.A. and Cheng, W.K., 'A Numerical Study of Diesel Ignition,' Energy-sources technology conference and exhibition, 87-FE-2, 1987
  10. Magnussen B.F. and Hjertager B,B., On Mathematical Modeling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion,' Sixteenth International Symposium on Combustion, 1977
  11. Gosman, A. D. and Ioannides, E., 'Aspects of Computer Simulation of Liquid-Fueled Combustors,' AIAA, 1981. pp. 81-323