摘要冷壁效应是推进剂燃烧的一种重要影响方式，因为壁面材料的冷壁效应与其热传导系数有关，为研究冷壁效应下双基推进剂的燃烧特性，所以选择热传导系数由大到小的铜、铝、铁、铅、玄武岩圆柱作为壁面材料，将双基推进剂药片紧紧贴于冷壁壁面，并在药片四周涂上隔热胶，通过常压燃烧实验和密闭爆发器实验，研究在不同程度冷壁效应下双基推进剂的燃烧特性。结果表明：从玄武岩、铅、铁、铝到铜，其推进剂的燃烧持续时间是逐渐增大而燃烧速率则是逐渐减小的。由此可以得出，壁面材料的冷壁效应越强，则推进剂的燃烧持续时间会相应变长，但同时推进剂的燃烧速率则会有明显的下降，燃烧变得不稳定。73531

毕业论文关键词 ： 双基推进剂 冷壁效应 壁面材料 热传导系数

毕业设计说明书外文摘要

Title  Research combustion characteristics of double base propellant under  the  effect  of  the  cold  wall                   

Abstract The cold wall effect is an important influential factor during the combustion of propellants, because the  the cold wall effect of wall materials  is related with  heat conduction coefficient, to research  the double base propellant combustion characteristics under the cold , so choose heat conduction coefficient from big to small copper, aluminum, iron, lead, granite column used as the wall material, the double base propellant pill tightly on the bottom of the cylindrical surface, and in around the tablets coated with insulation glue, by the closed bomb test and atmospheric combustion test ,in order to study the combustion characteristics the cold wall effect of double base propellant combustion in different degrees combusted in fixed volume。 Experimental phenomena and conclusions are as follows: from basalt, lead, iron, aluminum and copper, the duration of the burning of the propellant is gradually enlarged, the combustion rate is gradually reduced and copper, iron, aluminum and lead in reaching the maximum combustion velocity, critical burning layer thickness basically unchanged。 It can be concluded that the heat transfer coefficient of the wall material is larger, that is, the stronger the cold wall effect, the duration of the burning of the propellant will be longer, but the burning rate of the propellant will be decreased obviously。

Keywords ： Double base propellant；Cold  wall effect；Wall material；Thermal conductivity; the critical layer

目   录

1引言 1

1。1  研究的背景与意义 1

1。2  国内外研究现状 1

1。2。1  双基推进剂概述 1

1。2。2  冷壁效应作用下推进剂燃烧国内外研究现状 1

1。3  本论文主要研究内容 3

2  理论基础 4

2。1  双基推进剂燃烧特性分析 4

2。1。1 多阶段燃烧模型的物理描述 4

2。1。2 燃烧表面处的热平衡关系 6

2。2  双基推进剂定容燃烧理论基础 7

2。2。1  几何燃烧定律 7

2。2。2  燃烧速度 7

3  冷壁效应作用下的双基推进剂常压燃烧实验