Key technique of hybrid rocket motor and its development

Basing the structure and operation process of hybrid rocket motor, both of its advantages and disadvantages were presented. Also, concluding the national and foreign research so far, the key techniques and difficulties were summarized as follows: 1.developing high-energy solid fuel and raising regression rate of the solid fuel; 2.measuring regression rate of solid fuel during operation; 3.studing pyrogenation of different solid fuels; 4.building formulation of solid fuel regression rate; 5. repressing unstable combustion; 6.establishing subscale rule; 7.developing numerical model of hybrid rocket motor operation. All of adopted technique, progress, and future development were concluded.