Evaluation of burning rate in ECSP based on the voltage, pressure and initial temperature

Electrically controlled solid propellants (ECSP) have attracted extensive attention due to the tunable burning rate. The burning rate of ECSP determines the applying background of propellants and rocket engine structural design. Herein, an ECSP named ECSP was prepared using HAN as the oxidizer, PVA as the binder and self-developed electric controlled PCH as the fuel. It was investigated that the influence of pressure, initial temperature and voltage on the burning rate of the propellant. The results indicate that the pressure index n of ECSP is 0.36, the temperature sensitivity coefficient σ P is 0.005 K -1 . Under certain conditions, the burning rate of ECSP varies linearly with voltage, and the maximum regulation range is higher than 39%. Fitted the burning rate equation of ECSP with the voltage parameter based on Vielle’s burning rate equation, the consistency between the actual chamber pressure of the ECSP in the prototype and the predicted pressure by the burning rate equation was verified.