Study Of A Single-chamber Dual-thrust Solid Propellant Rocket Motor For A Missile

At present, except a few low altitude cruise missile adopt the turbojet engine, mostof the missiles have used the solid propellant rocket motor, include intercontinentalmissile、antitank missile、air-to-air missile、air-to-surface missile、ground/warship-to-airmissile and sublaunched missile and so on. In recent decades, thanks to the appearance ofthe high energy solid propellant、advanced formation process of propellant、excellentshell materials and ablation resistant polymeric materials and efficient and reliable thrustvector control devices, the solid propellant rocket motor have become the power plant ofthe strategic weapon, compare to the liquid-propellant rocket engine. Also this resultsfrom it has simple structure、achieved reliability、easy operation and simply maintenance、launch immediately and convenient for the load and other advantages.This paper presents a study of the small single-chamber dual-thrust solid propellantrocket motor, which will be used for the small accurate controlled weapon in the UAV.The rocket motor will supply the enough thrusts to the small missile, and insure that themissile can safely leave the UAV, and reach the required speeds and range, finally aim atthe targets. The paper has finished the design of the propellant grain, the design of thecombustors casing, the design of the long tail nozzle, the internal ballistics calculationand the thermal isolation and so on.To satisfy the missile’s requirement, we can use the single-chamber dual-thrust solidpropellant rocket motor, the first thrust is larger, and ensure the missile can safely leavethe UAV; and the second thrust is smaller than the first thrust, which can supply thebalanced thrust for the missile, and make sure the missile can fly further.