한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제7권7호
  • /
  • Pages.54-65
  • /
  • 1999
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

편심된 보울의 연소실을 갖는 디젤 엔진의 연소 특성 해석

Combustion Characteristics in the Offset Bowl Combustion Chamber Diesel Engine

  • 김홍석 (성균관대학교 대학원) ;
  • 성낙원 (성균관대학교 기계공학부)
  • 발행 : 1999.09.01
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초록

In this study, the flow field, spray structure, and combustion process were investigated in a direct injection diesel engine having an offset bowl in a combustion chamber. The KIVA-3V code was used in this study. In order to obtain accurate results, a droplet atomization model, wall impingement model, and ignition delay concept were added to KIVA-3V code. The results showed that the offset bowl engine had a large vortex flow. The direction of this flow counteracted to the direction of fuel injection in one side of combustion chamber. It decreased local turbulent kinetic energy and eventually nonuniform combustion was resulted in an offset bowl engine. In comparison with a center bowl engine case, the peak cylinder pressure was decreased about 6%. Finally , the effect of swirl on combustion was investigated in an offset bowl engine . As the became stronger, the nouniform characteristics in combustion were increased.

키워드

참고문헌

  1. SAE paper No.880422 A Study on Combustion of High Pressure Fuel Injection for Direct Injection Deisel Engine T. Kakegawa;T. Suzuki;K. Tsujimura;M. Shimoda
  2. SAE paper No.870373 In-cylinder velocity field measurements in a motored diesel engine G. Cipolla;A. Puglisi;C. Vafidis
  3. SAE paper No.881611 The influence of Bowl Offset on Air Motion in a Direct Injection Diesel Engine T. L. McKinley;R. J. Primus
  4. SAE paper No.870595 The Combined Effects on Fluid Flow During Compression of Piston Bowl Shape and Offset, and Swirl Ratio A. P. Watkins;S. Dessipris;H. Khaleghi
  5. Los Alamos Nationla Laboratory report LA-11560-MS KIVA-Ⅱ: A Computer Program for Chemically Reactive Flows with Sprays A. A. Amsden;P. J. O'Rouke;T. D. Bulter
  6. Los Alamos National Laboratory report LA-13313-MS KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves A. A. Amsden
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