Periodic Propellant Flames and Fluid-Mechanical Effects

We construct the combustion e eld generated by a periodic reactant supply that models the supply from a heterogeneous propellant. A full accounting of the e uid mechanics is incorporated. However, solutions differ little from those generated asssuming a uniform mass e ux (theconstant density model ). On the other hand, allowing for temperature-dependent transport (power law or Sutherland’ s law ) strongly affects the reaction rate and the heat e ux to the propellant surface. The effects of nonuniform mass e ux at the propellant surface are discussed, such nonuniformity arising, for example, because of the different densities of the oxidizer and binder. And we discuss the effects of hills and valleys in the propellant surface.