Unsteady Numerical Simulation of Controllable Thrust Solid Rocket Motor

Unsteady numerical investigation was preformed for controllable thrust solid rocket motor whose configuration changed with pintle moving.Theκ-eturbulence model and dynamic meshes method of FLUENT software were used. Results show that pintle could change the nozzle throat area and thus the motor pressure and thrust,which provided the capability for thrust control.The basic rules of variation of motor pressure,thrust and axial force on pintle was got. which would be helpful for controllable thrust solid rocket motor design and performance prediction.