Research on throat erosive burning regulations of nozzleless booster

Real-time X-ray radiography technologies were employed in ground test of nozzleless booster. Burning area regrassion rules were obtained through a series of radiographs. And then, burning rate as well as erosion ratio were achieved. The results show that throat burning rate decreases linearly, and the erosive ratio is reduced from 1.8 to 0.5 during nozzleless booster operations. For the mentioned propellant in this paper, erosive ratio is greater than 1.0 and increased with the static pressure when the throat static pressure is gnrater than 2.1 MPa. However, negative erosion phenomenon can be found when the pressure is lower than 2.1 MPa. These results can be used as the references to nozzleless booster performances prediction.