Investigations and applications of detonation propagation in energetic materials

可燃气体、固体炸药和高能液体中的爆炸在极端温度和压力下会产生非常复杂的行为。 本计划将研究爆震波扫过这些反应性材料（爆震波）的过程。 虽然爆轰波的速度可以用当前的理论提前精确计算，但这些波的动力学（它们如何启动，何时失败，它们如何响应几何形状的变化等）很难预测。 该计划采取的方法是在实验室和基于计算机的模型中研究更简单的模型系统。 所获得的见解可能有助于对爆炸物进行更准确的安全评估。 还将研究爆轰波在航空航天推进中的应用，以及作为一种手段，为测试目的以非常高的速度发射射弹。 具体地说，将探讨在气体中使用稳定的爆震波作为高速发动机的燃烧器的概念。 此外，还将尝试使用固体或液体爆炸来挤压管道使其关闭，以便将射弹驱动到1000米的速度，这反过来又可用于在实验室中模拟轨道碎片对航天器结构的撞击。

Detonations in combustible gases, solid explosives, and energetic liquids give rise to very complicated behavior occurring at extreme temperatures and pressures. The process by which a detonation sweeps through these reactive materials (detonation waves) will be studied in this program. While the velocity of detonation waves can be accurately calculated in advance with current theories, the dynamics of these waves (how they initiate, when they fail, how they respond to changes in geometry, etc.) is difficult to predict. The approach taken in this program is to study simpler, model systems both in the lab and in computer-based models. The insight obtained may permit more accurate safety assessments of explosives. Detonation waves will also be examined for applications in aerospace propulsion and as a means to launch projectiles to very high velocities for testing purposes. Specifically, the concept of using a stabilized detonation wave in gas as the combustor for a high-speed engine will be explored. In addition, the use of solid or liquid detonations to pinch a tube shut in order to drive a projectile to ultrahigh velocities will be attempted, which could in turn be used to simulate orbital debris impact on spacecraft structures in the laboratory.