Numerical simulations of injection-driven flows in a two-dimensional nozzleless solid-rocket motor

A numerical analysis has been performed to study cold flows in a nozzleless solid-rocket motor (SRM) consisting of a two-dimensional porous-walled duct and an impermeable-w alled diverging expansion section. The finite volume technique was used to solve the Navier-Stokes equations without subgrid-scale turbulence models, and the numerical fluxes were computed using a modified Godunov's scheme. Computed results are compared with existing experimental data, including mean pressure and axial velocity, the transition process of the meanvelocity profile, the level and shift of the turbulence intensity peak, and the pressure contour near the diverging expansion region. Furthermore, this study addresses the effects of injection on the near-wall velocity profiles of the fully turbulent flat-plate flow and the validity of the law of the wall throughout the flowfield in an SRM. B+ = Cf = e = F = G = h = / = /,, = k =