A Practical Method for Solving the Ignition Delay of Small Solid Propellant Rocket Motor

摘要

The ignition delay problems of two small solid propellant rocket motors with two kinds of different ignition manners are discussed respectively in this paper. Lots of experimental results indicate that the ignition delay is strongly depended on the ignition pressure. With the varieties of material and strength of the nozzle closure, the ignition delay is also heavily changed with the formers. The design condition of nozzle closure plays a more important role than that of adding igniter charge in solving the ignition delay to great extent. For the small solid propellant rocket motor, in order to solve the ignition delay, the ignition pressure must be high enough, so does the strength of nozzle closure; and the single ignition tests based on real ignition space provide an effective way to determine the design condition of the nozzle closure.