Effect of structure pattern of pasty propellant ramjet motors on combustion efficiency

Pasty propellant ramjet motors is a new propulsion system based on pasty propellant motor and ramjet motor.Various structure patterns of pasty propellant ramjet motors are presented and combustion efficiency of various structure patterns based on numerical simulation result of the reacting flow field of the motors analyzed.The research result shows that the structure pattern in which the pasty fuel-rich propellant is directly injected into after-burning chamber has higher combustion efficiency,and the foreside combustion efficiency of after-burning chamber decreases with the increase of axial distance of air intake,while the combustion efficiency slightly increases with the increase of included angle of air intake.