Influences of heat release, blockage ratio and swirl on the recirculation zone behind a bluff body

The recirculation zone created through vortex breakdown mechanisms in swirling flows plays a vital role for aerodynamic stabilization of turbulent flames practical combustion systems. This interacts with the central (CRZ) an upstream bluff body and this leads to complex flow behavior that depends on blockage ratio swirl number. It has been previously observed bubble (VBB) merges CRZ at large number or ratio. In study, influences heat release structure their physical are explored series eddy simulations experiments stabilized premixed flows. Comparisons simulation results measurements good. is isothermal flows, as increased, moves its mean changes. effect considerable differences characteristics pushed downstream due dilatation. critical number, which VBB merge, be higher reacting same