• 제목/요약/키워드: 스윌유동

검색결과 5건 처리시간 0.021초

난류 예혼합연소 화염의 LES 및 산업용 연소기 개발을 위한 LES 응용 해석 기술 (LES OF TURBULENT PREMIXED COMBUSTION FLAME AND LES APPLICATION FOR THE INDUSTRIAL COMBUSTOR DEVELOPMENT)

  • 박남석;류종력
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2010년 춘계학술대회논문집
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    • pp.437-441
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    • 2010
  • LES results of turbulent premixed combustion flows are introduced by using the dynamic sub-grid scale model based on G-equation describing the flame front propagation. The turbulent premixed combustion flows around bluff body and over backward facing step are analyzed to validate present formation. LES of swirling partially premixed combustion flame is also performed to conform the predictive capabilities of LES model and to prompt our understanding for the combustion flows over double cone swirl burner combustor by using CFD-ACE+ commercial code.

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희박연소 안정화를 위한 가스유동장 조건에 관한 연구 (Optimal Gas-Flow Conditions for Stabilization of Lean-Burn Combustion)

  • 이기형;이창식
    • 대한기계학회논문집
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    • 제19권3호
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    • pp.763-770
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    • 1995
  • Gas flow characteristics within the cylinder is important factors in impoving lean combustion stability. This paper shows the effects of various flow fields generated by a swirl control valve(SCV) on combustion process in a 4-valve spark ignition engine. An impulse swirl/tumble meter was used to elucidation the steady-state flow characteristics, and a rotating grating type LDV was developed to measure the mean velocity and tunbulence intensity in relation to the crank angle. These methodologies were applied to clarify the correlation between gas flow characteristics and combustion stability at a lean air fuel ratio. An analysis of the correlation revealed the gas flow conditions required to optimize a lean-burn system.

스월 유동을 이용한 오일 버너의 연소성능분석 (Analysis on Combustion Characteristics of the Oil Burner using Swirl Flow)

  • 최창우;김영환;정재현;박권하
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2005년도 전기학술대회논문집
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    • pp.1-8
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    • 2005
  • This paper addresses the analysis of the combustion characteristics in the oil burner using swirl flow. The reduction of exhaust emissions and high efficiency combustion techniques of the industrial burner have been studied to conserve environmental resources. We make swirl burner equal to dimension of wide burner and it is turn round of the combustion gas in construction. For a vigorous inner flow possessde 3m/s velocity in combustion gas of two burners. In calculation, we make use of a densely mesh to detailed analysis. In this study, the effect of swirl flow on the combustion of a commercial burner is analysed by experimental and also simulative manner. The results show the swirl burner has 40% better efficiency and less emissions of CO, HC, NOx and Smoke.

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피스톤 형상에 따른 디젤엔진 내부의 유동해석 (Flow analyses of a diesel engine with various piston shapes)

  • 기용덕;박형구
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2003년도 추계학술대회
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    • pp.992-997
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    • 2003
  • The flow characteristics along a intake/compression process are very important for the combustion process. The intake/compression flow fields are related to the piston shape of engine. The flow fields are analysed by using the ICEM-CFD IC3M code for the rapid mesh-generation and by using the STAR-CD code for the calculations. The influences of the piston bowl shapes were investigated. The results showed that piston shapes had influences on a intake/compression flow and offered the definite basic data in a design side.

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SCV에 의한 스윌 유동이 직분식 디젤 엔진의 연소에 미치는 영향에 관한 연구 (A Study on the Effects of Swirl Flow Generated by SCV on the Combustion Characteristics of the D.I. Diesel Engine)

  • 정재우;이기형;이창식
    • 한국자동차공학회논문집
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    • 제10권2호
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    • pp.31-39
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    • 2002
  • Recently, many researches have been performed to improve the performance of the combustion and emission in a D.I.Diesel engine. One of the main factors effect on the characteristics of combustion is the characteristic of air-fuel mixing. Thus, swirl flow has been used widely to improve the air-fuel mixing in a D.I.Diesel engine. Since this swirl flow has interaction with other factors, in this study, the characteristics of the combustion and the flame effected by the swirl flow generated by SCV was investigated. From this experiment, the interactions of the swirl flow and the injection timing made clear. In addition, the effects of swirl and injection timing on the diffusion flame were clarified.