摘要冲压发动机具有诸多优点例如结构相对简单、重量轻、体积小、成本低等，在射程和效费比等方面的优势是其他种类弹药不可以替代的。这样对冲压增程弹的流场分析就很必要。此次研究除设计了45mm冲压炮弹的气动结构外还利用fluent软件对冲压增程炮弹在多种工况下的流场进行了数值模拟和对比分析，并分析了冲压增程炮弹部分空气动力特性。首先根据冲压增程炮弹结构特点建立了二维流场数值模拟模型，对冲压增程炮弹绕流流场进行了数值模拟得到了45mm冲压炮弹的带化学反应的二维流场结构分析研究了45mm冲压增程炮弹的部分流场结构特征及其品质。另外通过变喷管喉径、来流马赫数分析了其流场参数、产物分布等的变化规律。69435

毕业论文关键词：冲压发动机 ，增程炮弹，流场分析，数值模拟

毕业设计说明书外文摘要

Title  Design and Simulation of Large Diameter Fin-Stabilized Solid Fuel RamjetAssisted Projectile

Abstract

Scramjet has many advantages such as relatively simple structure， light weight， small volume， and in esteem than the big， low cost. Among them in such aspects as range and cost-effectiveness than are the advantages of other types of ammunition can't replace. So to stamping the extended range of flow field analysis is very necessary. The study in addition to design the pneumatic structure of 45 mm stamping shell outside to stamping extended range projectile by using fluent software in a variety of working conditions of flow field numerical simulation and comparison analysis is made. And analysis of the stamping part extended range projectile aerodynamic characteristics.In this paper， first of all， according to the structural characteristics of stamping extended range projectile two-dimensional flow field numerical simulation model is established， the stamping extended range projectile on the numerical simulations of the flow field around a stamping got 45 mm shells with chemical reaction of two-dimensional flow field structure analysis of 45 mm stamping extended range projectiles is studied shunt field structure characteristics and quality.

Keywords: stamping engine， extended range projectiles， the flow field analysis， numerical simulation of the aerodynamic characteristics analysis

目   次

1  绪论 1

1.1  课题研究背景意义 1

1.2  固体燃料冲压炮弹的类型及特点 2

1.3  计算流体力学 4

1.4  研究的主要方向及其内容 4

2  固体燃料冲压发动机气动结构的设计方法 5

2.1  固体燃料冲压发动机基本结构 5

2.2  进气道的分类以及设计方法 5

2.2.1  进气道的分类 5

2.2.2  进气道的设计 7

2.3  唇口的设计 7

2.4  扩压段的设计 8

2.4.1  超声速扩压段设计 8

2.4.2  亚声速进气道设计 9

2.5  燃烧室设计 10

2.6  喷管设计 12

2.7  设计结果 14

3  物理模型的建立与边界条件