摘要论文以 155mm 大口径火炮为研究对象，对发射过程中的火药燃气传递和身管内部的温度分布进行分了分析研究。主要包括： （a）运用经典内弹道理论，对膛内发射过程中的气流速度、温度、密度和压力等参量进行了数值模拟，基于这些流动参数计算出了燃气对身管的对流换热系数； （b）对于身管采用二文轴对称导热模型，运用有限差分法对单发和连发过程中的身管进行热分析，并分析了身管导热系数和射频对身管传热的影响，然后用一文径向导热模型计算了身管传热，并与二文模型做了对比，发现结果差别不大； （c）简单设计了身管层间冷却的结构，用差分法对其进行了热分析，并用有限元软件 ANSYS 做了对比计算，层间冷却对于降低身管温度效果显著，最后分析了冷却结构对冷却效果的影响。9673
关键词 身管 传热 数值模拟 层间冷却 Title Numerical Calculation and Applied Analysis of the Coupling
Model between Interior Ballistics and Barrel Temperature Field
Abstract
Heat transfer was studied based on the 155mm gun .The main works are:
(a) The parameters such as gas velocity, temperature, density ，
pressure and convective coefficient were numerical simulated on the
theory of classical interior ballistics.(b)The 2D-Axisymmetric heat
transfer model was adopted, and the heat states of barrel during the
single round firing and continuous rounds firing were studied by the
Finite Difference Method.The effect of thermal conductivity and rate
of fire on temperature were analyzed.In addition,1d model was
computed , no significant difference was found between two models.(c)
Thermal analysis of the mid-wall cooling barrel was performed after a
simple cooling structure was established,and a FE model was sovled in
ANSYS.The results show that the mid-wall cooling method has a
significant effect on lowering the temperature. At last, the law of
cooling structure effect on temperature was analyzed.
Keywords barrel heat transfer numerical simulation
mid-wall cooling 目 次
1 绪论 1
1.1 研究背景 1
1.2 国内外研究状况 3
1.2.1 传热模型及数值计算方法 3
1.2.2身管热影响控制方法 4
1.3 本文主要工作 9
2 火炮内弹道模拟. 11
2.1 经典内弹道模型. 11
2.2 火炮发射时火药燃气温度变化. 13
2.2.1 膛内气流及压力分布. 13
2.2.2 膛内燃气温度变化规律. 16
2.3 火炮发射完成后的后效期模型. 16
2.3.1 平均参数法求压力、温度. 17
2.3.2 后效期内膛内压力分布. 19
2.4火炮发射过程数值模拟 . 22
2.4.1内弹道时期仿真结果 . 22
2.4.2后效期仿真结果 . 25
3 发射过程中的身管热分析. 26
3.1 引言. 26
3.2 身管热传导数值模型. 27
3.2.1 身管二文轴对称导热模型. 27
3.2.2身管传热的数值分析 . 27
3.3对流换热系数的近似 . 29
3.3.1身管内壁对流系数的确定 . 29
3.3.2身管外壁对流换热系数的确定 . 33
3.4 仿真结果分析. 34
3.4.1 单发时的身管热分析. 34
3.4.1 连发时的身管热分析. 36
3.5 其他因素对身管温度的影响. 39
3.5.1 单发时身管材料对身管传热的影响. 39
3.5.2 连发时射频对身管温度的影响. 40
3.6 径向一文导热模型计算及与轴对称模型的对比. 41 内弹道过程与身管温度场耦合数值计算及应用分析:http://www.751com.cn/jixie/lunwen_8471.html