Numerical study of flame acceleration phenomenon in high body force field
The development of modern aero turbine engine focuses on improving thrust-to-weight ratio and thrust-specific-fuel-consumption.To meet the above goal,innovations should be achieved in research of the core in aero engine,the combustor and combustion technique.For the sake of advanced combustor,the mechanism of high-g combustion was studied.Considering Rayleigh-Taylor instability,a 2D unsteady simulations were conducted to qualitatively and quantitatively analyze the mechanism of premixed flame propagation in a rotating tube.The result shows that the body force acting on the flame surface could induce the Rayleigh-Taylor instability enlarging the flame surface area,improving the reaction rate,and accelerating the flame speed.Based on the theoretical equations and current simulation results,the high-g combustion was divided into different phases and the leading mechanism of each phase was analyzed.The research could provide a reference for the further design of an ultra-compact combustor.
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