T型燃烧器杯型装药结构设计及试验异常分析

Structure design and experimental fault analysis of the cup-liked grain for T-burner

T型燃烧器是测量固体推进剂压力耦合响应函数的常用实验装置。为实现建压时间短暂、脉冲触发方式简便可靠的内弹道性能要求,基于考虑点火过程的内弹道计算程序进行了杯型装药结构设计,提供了具备系统性与通用性的T型燃烧器装药设计流程,设计装药可用于测量固体推进剂压力耦合响应函数;同时,针对异常内弹道结果进行了分析与计算,对药筒结构进行了改进并完成了实验验证,试验结果与内弹道计算结果吻合较好;最后,通过理论计算分析了装药结构参数对内弹道曲线的影响,为后续加工提供了指导。计算结果表明,与杯部深度不同,杯壁厚度的微小变化会引起内弹道曲线的突变,因此在装药加工时,应对杯部内径的加工精度与尺寸公差有较高的要求。

T-burner is the common experimental device for measuring pressure-coupling response function of solid propellants.In order to meet the interior ballistic performance requirements of short build-up time and simple&reliable pulse triggering mode,the cup-liked grain structural is designed based on the interior ballistic calculation program considering ignition process,and a systematic and universal design flow of T-burner grain is provided,which can be used to measure the pressure coupling response function of solid propellant.At the same time,the abnormal interior ballistic results are analyzed and calculated,the cartridge structure is improved,and the experimental verification is completed.The experimental results are in good agreement with the interior ballistic calculation results.Finally,the influence of grain structure parameters on interior ballistic curve is analyzed by theoretical calculation,which provides guidance for subsequent processing.The calculation results show that,different from the depth of the cup part,a slight change in the thickness of the cup part causes the sudden change of interior ballistic curve.Therefore,in grain processing,there should be high requirements for the machining accuracy and dimensional tolerance of the inner diameter of the cup part.