Investigations and applications of detonation propagation in energetic materials

在极端温度和压力下，可燃气体、固体炸药和含能液体中的爆炸会引起非常复杂的行为。本节目将研究爆轰穿过这些反应物质(爆震波)的过程。虽然目前的理论可以提前准确地计算出爆轰波的速度，但这些波的动力学(它们如何启动、何时失败、它们如何对几何形状的变化做出反应等)。很难预测。这个项目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。所获得的洞察力可能允许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，并将其作为测试目的以极高速度发射弹丸的一种手段。具体地说，将探索在气体中使用稳定爆轰波作为高速发动机燃烧室的概念。此外，还将尝试使用固体或液体爆炸来夹紧关闭的管子，以将炮弹驱动到超高速，这反过来又可以用来模拟轨道碎片对实验室中航天器结构的影响。

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.