한국연소학회:학술대회논문집
- 한국연소학회 2006년도 제32회 KOSCO SYMPOSIUM 논문집
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- Pages.32-38
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- 2006
벽면조건에 의한 미소관내 화염 전파 특성 변화에 관한 수치해석
A numerical study on the characteristics of flame propagation in small tubes under various boundary conditions
초록
A premixed flame propagating in a tube suffers strong variation in its shape and structure depending on boundary conditions. The effects of thermal boundary conditions and flow fields on flame propagation are numerically investigated. Navier-Stokes equations and species equations are solved with a one-step irreversible global reaction model of methane-air mixture. Finite volume method using an adaptive grid method is applied to investigate the flame structure. In the case of an adiabatic wall, friction force on the wall significantly affected the flame structure while in the case of an isothermal wall, local quenching near the wall dominated flame shapes and propagation. In both cases, variations of flow fields occurred not only in the near field of the flame but also within the flame itself, which affected propagation velocities. This study provides an overview of the characteristics of flames in small tubes at a steady state.