지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2020.9
- 수록면
- 210 - 213 (4page)
이용수
초록· 키워드
오류제보하기
Numerical simulation of moderately unstable detonation case in hydrogen-oxygen mixtures, which was known to have shock bifurcation in the leading detonation front, is simulated with detailed chemical kinetics and high-resolution schemes. Instantaneous plots of the detonation propagation confirm that small scale detonation occurs behind the incident shock leads to shock bifurcation in the detonation frontal structure. However, these are unstable and decays into the main detonation mode and destabilize the detonation front. This unstable single-mode large-scale detonation results in secondary combustion during the propagation and leads to shock bifurcation again. This instability observed in the shock bifurcation process was analyzed using Dynamic Mode Decomposition and the dynamics of this non-linear instabilities were explained in both spatial and temporal aspects. The high frequency secondary mode influences the detonation propagation and with the case considered in this study, the detonation frontal structure oscillates between 70~90 kHz. By analyzing the decomposed spatial structures and temporal characteristics, it is evident that this shock bifurcation phenomena exhibits fluctuating characteristics during the process and the dynamics of these instability phenomena is detailed in this study.
목차
ABSTRACT
Introduction
Numerical methodology
References
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