fluent制导火箭燃气舵矢量控制性能分析
推力矢量控制(Thrust Vector Control)的具体过程是通过控制发动机尾部喷流的方向来间接控制导弹飞行，可以补充或取代常规条件下利用飞行控制面产生的气动力来对飞行进行控制。它的基本原理是:当发动机的尾喷流偏转时，其推力可分解为三个方向的分力一轴向力、侧向力和法向力，法向力和侧向力相对于导弹质心分别产生偏航力矩和俯仰力矩，由于喷管喷口距离导弹质心较远，一个较小的推力偏转角就可以产生足够大的力矩，从而实现对导弹的有效控制。本文采用SolidWorks软件建立几何模型，用Icem软件完成网格的划分和设定，利用fluent软件建立燃气舵绕流流场物理模型，通过数值计算对比分析了无舵喷管、0°偏燃气舵和12°偏燃气舵的流场特性，得出燃气舵可以通过改变流场分布来获得所需的控制力(矩)矢量。
关键词 燃气舵；制导火箭；矢量控制；计算流体力学
毕业论文设计说明书外文摘要
Title Performance analysis of the jet vane vector control in guided rocket
Abstract
In order to satisfy the high mobility of missile，Jet vane can provide the necessary missile big pitch, yaw and roll control as a kind of vector control technology.Flow process of the combustion chamber is drastic and the flow field near the wall is complicated In the process of the missile in flight.Therefore,the research for interaction of jet vane and wake aerodynamic characteristics contributes to analysis of jet vane of vector control performance.
The process of Thrust Vector Control is controlling Missile flight by controlling the engine tail in the direction of flow，Which replaces conventional aerodynamic force generated by use of flight control surfaces to to control the flight.The basic principle：relative to the mass center of missile，thrust can be decomposed into three component in the direction of the axial force, side force and normal force, normal force and lateral force produce the yaw and pitch moment respectively When the engine tail jet cause deflection.Because mass center of missile nozzle jet distance is far,a smaller thrust deflection Angle can produce enough torque to realize the effective control of the missile.This design involves three software—SolidWorks to establishe geometric model，ICEM to structure the Grid model，fluent tosolve the analysis.we can draw a conclusion that Jet vane can obtain the required control force (torque) vector BY changing the flow field distribution.
Keywords jet vane,guided rocke,vector control，CFD
目 次
1.绪论 1
1.1选题背景及意义 1
1.2国内外研究现状 1
1.3论文主要工作简介 2
2控制方程的建立 3
2.1 流体运动研究基础 3
2.1.1 流体的定义 3
2.1.2 流体的性质及其假设 3
2.1.3 研究流体运动的基本方法 4
2.2.1概念 6
3前处理的过程 10
3.1模型的建立 10
3.1.1 物理模型的建立 10
3.1.2 几何模型的建立 10
3.2网格的生成方法 14
3.2.1 拟网格种类以及part的定义 14
3.2.2 block的建立 17