电磁轨道炮U形电枢的水中阻力系数研究
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摘要
分析了U形电枢在水介质中的阻力系数,提出了电枢在流体介质中的运动数学模型,基于有限元构建了U形电枢在水介质中的仿真模型,得到了U形电枢在水介质中的特征衰减长度,利用电枢有效长度解算出了U形电枢的阻力系数。构建了U形电枢回收试验系统,开展了回收验证试验。试验结果表明,得到电枢的阻力系数大约为1.283,与仿真结果基本一致。
The resistance coefficient of U-shaped armature in water medium was analyzed. The mathematical model of armature motion in fluid medium was analyzed,and the simulation model of U-shaped armature in water medium was constructed based on finite element method. The characteristic attenuation length of Ushaped armature in water medium was obtained. At the same time,based on the effective length of the armature,the resistance coefficient of the U-shaped armature was given. In order to verify the theoretical analysis and simulation results,the U-shaped armature recovery test system was constructed and the recovery verification experiment was carried out. According to the experiment results,the resistance coefficient of the armature is about 1. 283,which is basically the same with the simulation results.
The resistance coefficient of U-shaped armature in water medium was analyzed. The mathematical model of armature motion in fluid medium was analyzed,and the simulation model of U-shaped armature in water medium was constructed based on finite element method. The characteristic attenuation length of Ushaped armature in water medium was obtained. At the same time,based on the effective length of the armature,the resistance coefficient of the U-shaped armature was given. In order to verify the theoretical analysis and simulation results,the U-shaped armature recovery test system was constructed and the recovery verification experiment was carried out. According to the experiment results,the resistance coefficient of the armature is about 1. 283,which is basically the same with the simulation results.
引文
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[5]MARSHALL R A,WANG YING.Railguns:Their science and technology[M].Beijing:China Machine Press,2004.
[6]FAIR H D.Advances in electromagnetic launch science and technology and its applications[J].IEEE Transactions on Magnetics,2009,45(1):225-230.
[7]FAIR H D.Guest editorial the past,present,and future of electromagnetic launch technology and the IEEE international EML symposia[J].IEEE Transactions on Plasma Science,2015,43(5):1112-1116.
[8]FAIR H D.Electromagnetic launch:a review of the U.S.national program[J].IEEE Transactions on Magnetics,1997,33(1):11-16.
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