关键词: 固体推进剂火箭发动机;推进剂药柱;装药结构;星孔药柱

Abstract: modified star-shaped grain configration is presented, with consists of two sections: the front section has a cross-section-constant port with constant web thickness, while back section has a variable port with variable web thickness. The grain features of smoothly varying burning surface, less erosive burning, and less slivers are obtained.

Key words: Solid propellant rocket engine;Propellant grain;Charge structure;Star grain