SolidWorks某火炮炮口减压减噪装置设计
毕业论文关键字：减压减噪 炮口冲击波 噪声 计算流体力学 超压幅值
Title Design of a certain cannon silencer
Abstract The cannon produces high intensity sound pressure and muzzle blast wave while infiring, which hurts nearby gunners severely. In addition, high intensity soundand muzzle blast wave, caused by firing gun, destructs gun’s structure and revealits location to enemy. The cannon silencer,as referred above, is designedparticularly to decrease high intensity pressure and muzzle blast wave.A priority we are going to do is that analysis muzzle flow field with simulationof which we will get digital result, and we do the whole process through withoutsilencer. Those digital result we’re about to get includes pressure, temperatureand velocity. Secondly, we get simulation work done once again, but with thesilencer being added. Based on what study we have done, with Computational FluidDynamics principle and Mechanical design and specific technology on artillery we’re able to correct silencer designing. Finally, we can make utility of silenceron cannon, which decreasing sound and blast wave, to its limit as it could be.
Keywords Slilencer Blust wave High intensity sound Computational fluiddynamics
目次
1绪论....1
1.1选题背景1
1.2国内外关于内弹道学及膛口冲击波的研究1
1.3本论文的主要工作和要实现的任务...2
2炮口气流现象..4
2.1炮口气流....4
2.1.1炮口气流流出的一般概念...4
2.1.2炮口噪声..4
2.2基本假设、推论及重要关系式..4
2.3本章小结....5
3计算流体力学（CFD）基本模型6
3.1流体力学中系统与控制体6
3.1.1质量守恒方程（连续性方程）6
3.1.2动量守恒方程6
3.1.3能量守恒方程7
3.2ANSYSICEMCFD网格划分介绍7
3.2关于网格....8
3.3ICEM文件类型....8
3.4ICEM网格生成流程.9
3.5简单湍流模型..9
3.6初始条件和边界条件....9
3.6.1初始条件...9
3.6.2边界条件.10
3.7有关Fluent动网格计算方法..10
3.7.1动网格更新方法...10
3.7.2基于弹性变形的网格调整.11
3.7.3动态网格层变方法....11
3.7.4局部网格重构方法....12
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