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Approximating a free-field blast environment in the test section of an explosively driven conical shock tube

机译：在爆炸性的锥形冲击管的试验部分中近似自由场喷射环境

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摘要

This paper presents experimental data on incident overpressures and the corresponding impulses obtained in the test section of an explosively driven 10 degrees (full angle) conical shock tube. Due to the shock tube's steel walls approximating the boundary conditions seen by a spherical sector cut out of a detonating sphere of energetic material, a 5.3-g pentolite shock tube driver charge produces peak overpressures corresponding to a free-field detonation from an 816-g sphere of pentolite. The four test section geometries investigated in this paper (open air, cylindrical, 10 degrees inscribed square frustum, and 10 degrees circumscribed square frustum) provide a variety of different time histories for the incident overpressures and impulses, with a circumscribed square frustum yielding the best approximation of the estimated blast environment that would have been produced by a free-field detonation.
机译：本文介绍了关于事件过压的实验数据，以及在爆炸驱动的10度（全角度）锥形冲击管的试验部分中获得的相应脉冲。 由于冲击管的钢壁近似于由球形扇区切出的爆炸电极材料的球形扇区，5.3g闪亮岩减震管驱动器电荷产生与816g的自由场爆炸相对应的峰值过压 闪光灯球体。 在本文中调查的四个测试段几何形状（露天，圆柱形，10度铭刻平方截头截头截线）为事件超压和冲动提供了各种不同的时间历史，具有否定的方形截肢 估计爆炸环境的近似是由自由场爆炸产生的。

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