Analysis on influence of dynamic characteristics of gas generator insolid propellant ducted rockets

Aerospace Science and Industry Corporation,Beijing 100074,China)Abstract：An integral model of gas generator/solid propellant ducted rocket/missile was established, and typical performance parameters in the typical trajectory were obtained by simulation. Results showed that, in the climbing and cruising phases, the relative error of the fuel mass flow rate and the thrust of the engine was less than 7%. But in the diving phase, due to the free volume effect, the relative error of the fuel mass flow rate was -30%, and the error of thrust was -50% correspondingly. However, the relative errors of flight velocity and flight range were less than 5% and 1% respectively. Therefore, for this typical climbcruisediving flight trajectory described, the dynamic characteristics of gas generator can be ignored in analysis of the missiles working process.