关键词: 硝胺推进剂;推进剂点火;激光点火;点火延迟

Abstract: The effect of surface area of ammonium perchlorate(AP), initial temperature, heat fluxes and catalyst on the ignition delay time of NEPE propellant, which is a special nitromine composite propellant was examined in detail within a CO 2 laser ignition system. The results show that AP acts as a kind of trigger during ignition and is of more importance than HMX. There exists laser ignition thresholds, and the effect of initial temperature on ignition delay time is influenced by heat fluxes. This effect is more significant at lower heat fluxes. The large AP surface area benefits the decrease of ignition delay time when the initial temperature is higher than 15℃, while this effect will be realized by the relatively small AP surface area below 15℃. The addition of an effective catalyst can also shorten the ignition delay time by decreasing the reaction activation energy.

Key words: Nitramine propellant;Propellant ignition;Laser ignition;Ignition delay