Interior Ballistic Calculation of Cartridge with Equal Web Size Seven-Perforation Gun Propellant

The shape function method is usually used in interior ballistic calculation of aviation cartridge. It has a strict derivation process, but when gun propellant splits, the binomial function cannot fully reflect the shape characteristics of gun propellant. According to the geometric combustion law of gunpowder, a new calculation method of interior ballistic for equal web size seven-perforation gun propellant is proposed by calculating seven-perforation gun propellant instantaneous combustion area, which can meet that when the gunpowder completely burned, the relative burning area is zero, and it can improve the accuracy of interior ballistic calculation.