Published 4 issues per year
ISSN Print: 1065-3090
ISSN Online: 1940-4336
Indexed in
NUMERICAL VISUALIZATION OF FLAME SPREADING IN SOLID-FUEL RAMJET COMBUSTORS
ABSTRACT
A numerical visualization is performed to study turbulent reacting flows in solid-fuel ramjet (SFRJ) combustors. The time-dependent axisymmetric compressible conservation equations are solved with the Smagorinsky subgrid-scale turbulence model. The combustion process considered is a one-step, irreversible, and infinitely fast chemical reaction. The numerical code uses the finite-volume technique, which involves alternating in time the second-order explicit MacCormack's and modified Godunov's schemes. The temporal evolution of flow structures, temperature distribution, and flame shape are visualized in terms of the instantaneous streamlines, temperature contours, and stoichiometric mixture fraction. In addition, the entrainment of the fluid particles into the coherent vortices and the interaction of fuel and air particles are visualized by the timelines, streaklines, and pathlines. The flame spreading in such an SFRJ combustor is found to be characterized by an opposed flame spread and a concurrent one starting from the instantaneous reattachment zone.
-
Veraar Ronald G., Oosthuisen R. , Andersson K. , RAMJET PROPULSION FOR PROJECTILES-AN OVERVIEW OF WORLDWIDE ACHIEVEMENTS AND FUTURE OPPORTUNITIES , International Journal of Energetic Materials and Chemical Propulsion, 21, 5, 2022. Crossref