Investigation of the effect of ring-cavity on secondary-combustion and interior ballistic stabilization with low-temperature solid propellant in gas ejection

The potential for secondary-combustion with low-temperature solid propellant in gas generation is a risk to ejection application. This study performed three-dimensional dynamic numerical simulation Re-Normalization Group turbulence model and finite-rate/eddy-dissipation of two-step reaction mechanism better understand the interaction between ring-cavity structures, combustion effect on loads interior ballistic stabilization during ejection. zone rail cover was modelled as rigid body, its motion coupled flow initial chamber based layering method. A comparison results experimental data published literature showed good agreement. Four different volume geometries were simulated, including no ring-cavity. Results that three-stage high-temperature can be divided at founding time four cases, which are pair spherical zone, skirt touching walls reverse from cover. Additionally, increasing accelerate axial radial hot velocity cross-section postpone process. It also found larger structure smoothen pressure acceleration curves, reduce out-tube-velocity delay out-tube-time.