摘要阻燃剂包覆药，是一种能够有效改善火药点火燃烧特性，优化火炮发射内弹道性能的新型发射药。从火药颗粒结构上看，它由阻燃剂包覆层和主装药构成，其中内层为常规火药颗粒，外层为阻燃剂包覆层。在点火燃烧的时候，火药颗粒表面的阻燃剂包覆层能够将火药燃气与火药颗粒隔离开来，阻燃剂包覆层通过自身的物理化学反应来延迟主装药的点火燃烧，从而达到优化内弹道性能的目的。由于火药点火燃烧的非稳态效应及阻燃剂包覆层的结构特征，可以将点火燃气与阻燃剂包覆层的传热看成一维非稳态传热过程，本文以点火燃气与阻燃剂包覆从的一维非稳态传热模型为核心，进行阻燃剂包覆药的点火燃烧特性研究工作，主要进行的工作如下：83254

    （1）通过阻燃剂包覆药控制火药燃烧的原理、方法，建立点火燃气阻燃剂包覆间的传热及火药颗粒燃烧模型。

    （2）设计实验装置并制定实验方案，进行阻燃剂包覆药在密闭爆发器内的点火燃烧特性实验，通过对实验的数据分析，研究阻燃剂包覆药的点火燃烧特性。

    （3）采用数值计算手段对火药燃气与阻燃剂包覆层间的传热及火药颗粒的燃烧过程进行数值模拟，并将计算结果与实验结果进行比较，分析影响阻燃剂包覆药燃气释放速率的因素，为优化阻燃剂包覆药的设计提供基础。

毕业论文关键词  阻燃剂包覆药  点火延迟  一维非稳态传热  实验研究  数值模拟

毕业设计说明书外文摘要

Title  Experimental study and numerical simulation  on ignition And combustion characteristics of   flame retardant coating                       

Abstract Flame retardant coating agent is a new type of propellant which can effectively improve the ignition and combustion characteristics of propellant and optimize the interior ballistic performance of the gun。From the powder particle structure, it consists of the flame retardant coating layer and the main charge composition, in which the inner layer is a conventional powder particles, the outer layer is a flame retardant coating。When ignition, the powder particles on the surface of the flame retardant agent coating layer to the propellant gas and powder particles to isolate, flame retardant coating layer by its physical and chemical reaction to delay the ignition of the main charge combustion, so as to achieve the purpose of optimization of interior ballistic performance。Due to ignition combustion unsteady effect and flame retardant coating layer structure, the ignition gas and flame retardant agent coated layer of heat transfer as one dimensional unsteady heat transfer process, the ignition gas and flame retardant agent coating from one-dimensional non steady heat transfer model as the core, flame retardant agent coated drug of the ignition and combustion characteristics of, the main work is as follows:

   （1）Based on the principle and method of controlling the combustion of propellant by flame retardant coating, the heat transfer and powder particle combustion model of the flame retardant coating was established。

   （2）The experimental device was designed and the experimental program was developed。 The ignition and combustion characteristics of the flame retardant were studied。 The ignition and combustion characteristics of the flame retardant coating were studied through the analysis of the experimental data。

   （3）Using numerical calculation method of propellant gas and flame retardant agent coating layer between heat transfer and powder particle combustion process was simulated, and the calculated results and experimental results were compared, analysis of the impact of flame retardant coated propellant gas release rate factors, to optimize the flame retardant coating of drugs designed to provide the basis。