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机构地区:[1]南京理工大学能源与动力工程学院,江苏南京210094
出 处:《兵工学报》2016年第10期1941-1948,共8页Acta Armamentarii
摘 要:传统的两相流内弹道模型将火药颗粒作拟流体假设,对于采用长管状药装药的大口径高速平衡炮来说误差较大。为解决这一问题,针对管状药模块化装填的某480 mm口径高速平衡炮提出在欧拉坐标系中考察火药气体的流动情况,在拉格朗日坐标系中追踪管状药束的运动规律;同时针对药束径向运动方程难以建立的问题,提出药束沿径向线性排布药束的思想,建立了考察管状药束沿轴向的运动规律并能够描述火药气体沿轴向和径向的流动情况的内弹道模型,编制程序进行了数值模拟。通过计算结果与试验结果的对比分析,证明了建立的模型有效,得到了火药气体在轴向和径向的压力分布以及药束模块的运动轨迹,为平衡炮内弹道性能的深入研究提供了新的思路。Considering that the length of the tubular charge for the large caliber high speed Davis gun is long,the traditional pseudo-fluid hypothesis in two-phase flow model may cause errors. In order to solve this problem,Eulerian coordinate system is used to settle the gas field,and the Lagrangian coordinate system is used to settle the solid field. It is assumed that the tubular charge clusters are linearly configured along radial direction,these clusters move along axial direction,and gas moves along radial and axial directions. Based on this assumption,a two-dimensional interior ballistics model is established for a480 mm Davis gun with tubular modular charge. Then through the comparison of the simulated and experimental results,the proposed model is verified to be effective. The distribution of gas pressure along two directions and the movement rules of tubular charge clusters along axial direction were obtained by further analysis of the simulated results.
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