期刊
SHOCK WAVES
卷 23, 期 3, 页码 191-200出版社
SPRINGER
DOI: 10.1007/s00193-013-0444-9
关键词
Deflagration-to-detonation transition; Adiabatic and isothermal walls; Boundary conditions; Turbulence model
类别
资金
- KAKENHI [21360420]
- Grants-in-Aid for Scientific Research [21360420] Funding Source: KAKEN
Detonation in ducts is usually studied assuming adiabatic walls because of the high kinetic energy due to the incoming flow being supersonic. In the present work, numerical simulations of deflagration-to-detonation transition (DDT) using a detailed chemical reaction model are performed under adiabatic and isothermal boundary conditions in a tube with no-slip walls. The results show a local explosion driving DDT, which occurs near the tube wall in the case of an adiabatic wall, but close to the flame front in the case of an isothermal wall. Furthermore, to examine the effects of a turbulent boundary layer, a simulation using the Baldwin-Lomax turbulence model is carried out. In the case of the isothermal wall, there is again a local explosion near the tube wall, which leads to detonation. In summary, the present study confirms that the boundary conditions affect the transition to detonation and that the boundary layer is a key component of DDT.
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