Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Large Eddy Simulation and Parametric Study of Turbulent Flow Characteristics in the Internal Combustion Chamber using SGS Model

연소실 내 난류유동장 특성에 대한 아격자 모델을 사용한 LES 모사 및 관련인자 영향 평가

  • Nam, Seung Man (School of Mechanical Engineering, Chungbuk National University) ;
  • Lee, Kye Bock (School of Mechanical Engineering, Chungbuk National University)
  • Received : 2012.05.17
  • Accepted : 2012.09.14
  • Published : 2012.09.30
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Abstract

Large eddy simulation (LES) is increasingly used as a tool for studying the dynamics of turbulence in combustion chamber flows due to the promise of wider generality and more accurate results compared to Reynolds averaged Navier-Stokes(RANS) models. This study presents the appropriate subgrid-scale(SGS) model in LES for predicting the turbulent flow field in the internal combustion engine. The study of the effects of model and numerical parameters such as discretization scheme, initial condition, time step and SGS model was performed. The results of LES using the SGS model were found to be in the good agreement with experimental data.

큰 에디 모사(LES)는 복잡한 연소실 유동에서 RANS 모델과 비교해 난류 유동장에 대해 모델의 보편성과 더 정확한 결과를 제공하기 때문에 점차적으로 사용이 증대되고 있다. 내연 기관의 연소실 내 난류 유동장 해석을 큰 에디 모사를 사용하여 수행하였다. 이산화 방식, 초기 조건, 시간 간격과 SGS 모델과 같은 모델과 수치 인자에 따른 영향을 평가하였다. SGS 모델을 사용한 LES 모사는 실험치와 유사한 결과를 보여주었다.

Keywords

Acknowledgement

Supported by : 충북대학교

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