星形内孔装药的非均匀侵蚀燃烧

本文对星形内孔装药的一个单元星角内的侵蚀燃烧进行实验研究。实验表明沿装药燃烧周界侵蚀燃烧是不均匀的, 星谷附近的燃速大于星尖附近的燃速。侵蚀燃烧的不均匀程度与燃气平均流速、燃气压强以及星角的大小有关。二维流场计算与实验结果对照说明, 流速分布不均匀是造成侵蚀燃烧不均匀的主要原因。 

NONUNIFORM EROSIVE BURNING IN STAR-CORE GRAIN IN A SOLID-PROPELLANT ROCKET ENGINE

The experimental investigation of erosive burning in one lobe of the star core grain in a solid propellant rocket engine was carried out.The experimental results show that the erosive burning rate in the star recess is higher than that at the star point.The nonuniformity of erosive burning is dependent on the average flow velocity parallel to the burning surface,the chamber velocity parallel to the burning surface,the chamber pressure and the geometry of the cross section.From comparison between the calculational results and experimental data it is concluded that the nonuniformity of the erosive burning comes mainly from the nonuniformity of the velocity distribution.