颗粒模压发射药装药的点传火性能

摘要

Grain-molded gun propellant was prepared based on nitramine propellant by surface-deterring,surface-coating,and grain-molding. Two ignition schemes including bottom configuration and central core igniter were designed. Results show that compared with the bottom configuration,ignition delay time shortens 15. 2% and the maximum negative pressure difference de-creases 8. 41 MPa of central core igniter,and the maximum extrusion process of the propellant decreases 11. 93 MPa,which indi-cate that central core igniter ignition scheme can bring perfect ignition performance for grain-molded gun propellant charge.%以粒状高能硝胺发射药为基础药，经过表面钝感、包覆、模压处理，制备颗粒模压发射药。设计底部结构和传火管结构两种点传火结构方案，利用30 mm高压模拟火炮，研究颗粒模压发射药装药的点传火性能。结果表明，与底部结构相比，传火管结构将颗粒模压发射药装药的点火延迟时间缩短15．2％，膛内最大负压差降低8．41 MPa，装药床受到的最大挤压力减小11．93 MPa。传火管结构方案使颗粒模压发射药装药具有良好的点传火性能。