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摘要: 应用我们发展的一个激光与金属蒸汽相互作用的简化物理模型对激光维持爆震波的点火激励、传播规律作了数值研究并取得了较好的结果。计算得到的LSD波阈值与激光脉宽的关系表现出典型的幂规律Ith-1/2。此外，还得到了一些关于LSD波屏蔽效应的有益结果。在LSD波充分发展的阶段，LSD波阵面的光学厚度可达5~10的量级，这表明LSD波具有很强的屏蔽作用。
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关键词:
- 激光维持爆震波 /
- 激光与金属蒸汽相互作用 /
- 点火机理
Abstract: A physical model for laser metal-vapor interactions has been developed and used to study numerically the laser supported detonation waves (LSDWs) in vapor in front of metal targets, and some good results about LSDWs, such as ignition mechanism, threshold, propagation law and so on, have been obtained numerically with the model. A power law between LSDWs threshold and laser pulse duration, Ith-1/2, has been obtained. Some useful results about the LSDWs shield effects have also been obtained. In the developing phase of LSDWs, the optical thickness of the front of LSDWs may reach 5~10 in order of magnitude. It is shown that the LSDWs are able to play a very strong shield role.-
Key words:
- LSDWs /
- laser target-vapor interaction /
- ignition mechanism
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Neilson P E, Jackson J P. USAF-TR-80-7, 1980. Holmes B S, Maher W E, Hall R B. J Appl Phys, 1980, 51(11): 5699. Mazhukin V I, Uglov A A, Chetverushskin B N. Sov J Q E, 1982, 12(5): 573. Dan'shchikov E V, Dymshakov V A, et al. Sov J Q E, 1982, 12(1): 67. Fisher V I, Kharash V M. Sov Phys JETP, 1982, 55: 439. 刘成海, 等. 一维双温多相流激光热烧蚀物理模型. 应用物理与计算数学研究所报告, 1988. 刘成海, 裴文兵, 等. 强激光与靶蒸汽相互作用简化物理模型. 应用物理与计算数学研究报告, 1988. Maher W E, Hall R B, Johnson R R. J Appl Phys, 1974, 45(5): 2133. Ready J F. Appl Phys Lett, 1973, 25(10): 38. Барруков А И, и др. ЖЭТФ, 1974, 66: 965. Hopper R W, Uhlmann D R. J Appl Phys, 1970, 41: 4023. Hetiche L R, et al. J Appl Phys, 1976, 47(4): 1415. 刘成海. 激光-靶耦合与激光破坏. 应用物理与计算数学研究所报告, 1987. -
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