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대형 디젤엔진의 NOx 저감을 위한 연료분사노즐 최적화 연구
The Optimization of Fuel Injection Nozzles for the Reduction of NOx Emissions in a Large Diesel Engine

윤욱현   (현대중공업 엔진연구실CC0002871  ); 김병석   (현대중공업 엔진연구실CC0002871  ); 김동훈   (현대중공업 엔진연구실CC0002871  ); 김기두   (현대중공업 엔진연구실CC0002871  ); 하지수   (현대중공업 엔진연구실CC0002871  );
  • 초록

    Numerical simulations and experiments have been carried out to investigate the effect of fuel injection nozzles on the combustion and NOx formation processes in a medium-speed marine diesel engine. Spray visualization experiment was performed in the constant-volume high-pressure chamber to verify the numerical results on the spray characteristics such as spray angle and spray tip penetration. Time-resolved spray behaviors were captured by high-speed digital camera and analyzed to extract the information on the spray parameters. Spray and combustion phenomena were examined numerically using FIRE code. Wave breakup and Zeldovich models were adopted to describe the atomization characteristics and NOx formation processes. Numerical results were verified with experimental data such as cylinder pressure, heat release rate and NOx emission. Finally, the effects of fuel injection nozzles on the engine performance were investigated numerically to find the optimum nozzle parameters such as fuel injection angle, nozzle hole diameter and number of nozzle holes. From this study, the optimum fuel injection nozzle (nozzle hole diameter, 0.32 mm, number of nozzle holes, 8 and fuel injection angle, $148^{\circ}$ ) was selected to reduce both the fuel consumption and NOx emission. The reason for this selection could be explained from the highest fuel-air mixing in the early phase of injection due to the longest spray tip penetration and the highest heat release rate after $19^{\circ}$ ATDC due to the increased injection duration.


  • 주제어

    연료분무가시화 .   연료침투길이 .   분무원추각 .   연료분사각도 .   노즐 홀 직경 .   노즐 홀 개수.  

  • 참고문헌 (17)

    1. M. A. Patterson, S. C. Kong, G. J. Hampson and R. D. Reitz, 'Modeling the Effects of Fuel Injection Characteristics on Diesel Engine Soot and NOx Emissions,' SAE 940523, 1994 
    2. K. S. Cha, W. I. Chung and C. G. Park, 'A Study on Spray Behaviors with Variation ofNozzle Diameter in the Diesel Combustion Chamber,' Transactions of the KSAE, Vol.8, No.3, pp.18-27, 2000 
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    6. R. D. Reitz and R. Diwakar, 'Structure of High-Pressure Fuel Sprays,' SAE 870598, 1987 
    7. L. Schiller and A. Z. Naumann, VDI 77,pp.318-320, 1993 
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  • 이 논문을 인용한 문헌 (2)

    1. Sim, Han-Sub 2011. "A Study on NOx Reduction for a Small Marine Diesel Engine" 한국기계가공학회지 = Journal of the Korean Society of Manufacturing Process Engineers, 10(5): 79~84     
    2. Sim, Han-Sub 2013. "A Study for Development of a Marine Diesel Engine from a 500Ps Commercial Vehicle Diesel Engine" 한국기계가공학회지 = Journal of the Korean Society of Manufacturing Process Engineers, 12(6): 125~131     

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