摘要：The flow fields of the thermally choked mode of ram accelerators were studied numerically. The goal of this study was to investigate the effects of the gas reaction rate, the velocity and the projectile shapes on the performances of ram accelerators. The thermally choked mode was demonstrated to occur only when the variations in the reaction rate and projectile velocity were within certain limits. The use of a boat-shaped projectile can extend this limit. The flame front can stand at both its shoulder and the base, and the thrust is the greatest at its shoulder.
