Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Numerical Analysis of a Highly Unstable Detonation Considering Viscosity and Turbulence Effects

점성 및 난류 효과를 고려한 강한 불안정 데토네이션 파의 수치 해석

  • 강기하 ((주)한화 여수공장) ;
  • 신재렬 ((주)대우건설 기술연구원) ;
  • 조덕래 (부산대학교 대학원 항공우주공학과) ;
  • 최정열 (부산대학교 항공우주공학과)
  • Received : 2011.06.29
  • Accepted : 2011.07.28
  • Published : 2011.08.30
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Abstract

It has been suggested that turbulent effect should be considered for the study of highly unstable detonation of hydrocarbon fuels, as in the case of pulse detonation engine (PDE). A series of numerical study are carried out to understand the characteristics of the highly unstable detonation by considering viscosity, turbulence model and turbulence-combustion interaction model. Through studies of the different levels of modeling, it is understood that the viscosity and turbulence have negligible effects on low frequency characteristics, but tend to enhance the high frequency characteristics. It is also considered that the turbulence-chemistry interaction model should be taken the influence of the activation energy into account for detonation studies.

펄스 데토네이션 엔진에서와 같이 탄화수소를 연료로 하는 데토네이션 파는 강한 불안정성을 가지며 난류 연소 효과를 고려한 연구를 수행하여야 함이 제시된 바 있다. 본 연구에서는 강한 불안정성을 가지는 데토네이션 파의 구조를 이해하기 위하여 비점성 해석, 점성 해석, 난류 모델 및 간단한 난류 연소 모델을 고려한 수치 해석 연구를 수행하였다. 모델링 수준에 따른 연구를 통하여 점성 및 난류는 저주파 특성에는 거의 영향이 없으나, 고주파 특성을 강화하는 경향이 있는 것으로 보인다. 한편, 데토네이션 연구를 위한 난류-연소 상호 작용 모델에는 활성화 에너지의 영향이 고려되어야 하는 것으로 여겨진다.

Keywords

References

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