摘要
潜载导弹水下弹射产生的筒口气泡载荷对水下发射安全有着重要影响。围绕潜载导弹水下弹射筒口气泡膨胀降压和收缩增压的物理机制,建立筒口气泡载荷发展变化的数理模型,为气泡载荷特性分析提供有效途径。数理模型利用不可压缩势流模型描述水环境在气泡作用下的流动状态,采用包含筒内外工质气体的均压模型描述气泡压强变化,并采用直接边界元法进行求解计算。结合弹射实验数据和计算流体力学仿真结果的对比分析表明,数理模型可有效反映水下弹射弹体离筒初期筒口气泡的发展演变过程,能够用于筒口气泡载荷特性的预估和分析。
The gas bubble around the outlet of underwater ejection canister for submarine-launched missile significantly affects the launching safety of missile.Based on the physical mechanisms of expansion-induced depressurization and contraction-induced pressurization of gas bubble,a mathematical model of gas bubble evolution is proposed to analyze the characteristics of bubble loading.The water flow fields are simulated by an incompressible potential flow model and solved by the direct boundary element method.The gas flow fields are calculated by an uniform pressure model.The gas bubble model is validated by comparing with experimental data and numerically simulated results.It is shown that the proposed model can be used to predict the load status of gas bubble for the early stage of missile leaving the launch canister.
作者
刘浩天
傅德彬
毕凤阳
杨华伟
卢丙举
LIU Haotian;FU Debin;BI Fengyang;YANG Huawei;LU Bingju(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;The 713rd Research Institute of CSIC,Zhengzhou 450015,Henan,China;Henan Key Laboratory of Underwater Intelligent Equipment,Zhengzhou 450015,Henan,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2022年第3期599-604,共6页
Acta Armamentarii
基金
装备预先研究领域基金重点项目(JZX7Y20190247021201)。
关键词
潜载导弹
水下弹射
筒口气泡
数理模型
边界元法
submarine-launched missile
underwater ejection
outlet gas bubble
mathematical model
boundary element method
