ABSTRACT

The aim of this work is to present a novel numerical study applied to the chain propagation of the explosion of a special kind of propellant and the formation of overpressures inside a rigid and resistant partitioned vessel. A calculation methodology is developed to simulate the transmission of the explosion from one compartment to another adjacent compartment by the means of the hot flow through the shared orifice and finally to generalize this novel methodology for propellants to rigid and resistant complex multi-partitioned structures. The basic characteristics of the model have been developed for the ignition and the combustion of classical propulsive powders in a one-compartment vessel and adapted to a solid propellant such hexogen with appropriate parameters linked to simplified kinetics. A simple representation of the combustion phenomena based on energy transfers and the action of specific molecular species is presented. The model allows the study of various parameters such as the initial thermodynamic conditions, the location of the ignition energy, and the size of the inner openings or the vent areas. The model calculations have been compared with data obtained in the course of experimental works and indicate interesting preliminary trends.

摘要

这项工作的目的是提供一种新颖的数值研究方法，用于特殊类型推进剂爆炸的链传播以及在刚性且耐久的分隔船内部形成超压。开发了一种计算方法，以通过穿过共用孔口的热流模拟爆炸从一个舱室向另一相邻舱室的传播，并最终将这种新颖的方法用于推进剂到刚性和耐久的复杂多分区结构。该模型的基本特性已经开发出来，用于在单舱式容器中点火和燃烧经典推进剂粉末，并适用于固体推进剂（如含氧量），并具有与简化动力学相关的适当参数。给出了基于能量转移和特定分子种类作用的燃烧现象的简单表示。该模型允许研究各种参数，例如初始热力学条件，点火能量的位置以及内部开口或通风口面积的大小。已将模型计算与在实验工作过程中获得的数据进行比较，并表明有趣的初步趋势。