水下固体发动机点火设计与试验

Design and Test of Ignition for Underwater Solid Rocket Motor

在水下双推力发动机研制中,设计了烟火剂型点火装置,采取双药盒点火模式。结合理论计算以及经验公式估算后,与类似的发动机进行比较计算,根据使用条件进行了修正,确定了点火药量。完成了在5～14MPa压强范围内标准试验发动机试验、点火一致性以及点火药盒试验,直接应用到全尺寸发动机地面试验。试验结果表明,发动机点火正常,能够保证药柱正常燃烧,发动机及时工作,工作压强与推力曲线完整、有效,点火一致性良好。目前采用的这种工程方法是可行、合理且有效的。

Ignition device with fireworks agent was designed using dual ignition cylinders for dual thrust underwater solid rocket motor （SRM）. The ignition charge was obtained via theoretical calculation, estimation by empirical formula, similar SRM analog, and working condition revision. The tests for standard SRM in the range of 5 - 14 MPa, conformity of ignition, ignition cylinder, and full size SRM were performed. The results show that the ignition and the grain combustion are normal, the SRM starts timely, the curves of pressure-time and thrust-time are satisfying, the ignitions are in step. This ignition method is verified reasonable and valid.