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摘要: 本文介绍一种简单的数值计算模拟，它可以模拟轨道炮的主要性能。模型中考虑了由于炮膛壁烧蚀引起的电枢等离子体质量的增加和各种阻力的影响。这些阻力包括弹丸与壁之间的摩擦力，等离子体粘性及空气阻力等。用一个经验关系表征它们的影响。我们把等离子体等效成一个可变电阻负载，而不管它与电离度有关性质的细节。数值计算结果与实验结果比较表明符合程度是满意的。Abstract: A numerical calculation model simulating the main performance of electro-magnetic railguns is described in this paper. The model takes into account the increase in plasma armature masses due to the wall ablation and the drags caused by various effects such as the friction between projectile and wall, the plasma viscosity and the air resistance etc. We characterize the drags by an experimentally determined coefficient and consider the plasma armature as a time-dependent resistance while neglecting the detail related with the plasma properties. The agreement between the numerical and the experimental results is rather good.
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Key words:
- rail gun /
- armature /
- plasma /
- muzzle voltage
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Thio Y C. MRL-R-873, 1983. Thio Y C, Frost L S. AD-A169349, 1986. Powell Joha D, Batteh J H. AD-A0 92345, 1980. Parker J V, et al. AIAA-85-1575, 1985. Ray P K. NASACR 174816, 1984. Richardson D D, Marshall R A. AD-A139586, 1984. Rashleigh S C, Marshall R A. J Appl Phys, 1978, 49(4): 2540. Thio Y C, Clark G A, Bedford A J. MRL-R-875, 1983. -
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