Passive shock wave attenuation using shock-free surface interaction in combination with shock focusing techniques

PI: Eliasson， veronica提案号：1437412提议的实验研究的目标是调查激波与液体的相互作用，并发现减轻激波影响的方法。这一提议旨在研究如何通过在传播激波的路径中添加特定几何形状的液体片来获得激波衰减。这里提出的基础工作可以应用于设计廉价可靠的方法来保护建筑物，车辆和人类免受冲击和冲击波冲击的威胁。例如，它可以对爆炸技术、炸药和引爆很重要的建筑和采矿业产生影响。无论是露天还是地下矿山事故，都会引起冲击波的传播，具有毁灭性的影响，因此，应促进冲击波的衰减，以减少破坏和伤害。主要研究目标是(a)了解入射激波和自由表面之间的动力学，以及(b)探索和量化衰减程度如何取决于牛顿和非牛顿流体及其质量的作用，以及热学和惯性性质。除了定量和定性的高速激波成像外，还可以直接测量激波振幅、峰值压力、总冲量。获得这种基本的理解可以带来使用现有的环保液体来减少冲击的方法。实验将在激波管内进行，数值模拟将使用有限体积方法进行。在推广和教育方面，该提案包括一个明确的计划，让研究生和本科生参与研究。Pi将与南加州大学的WiSE项目（女性科学与工程）合作，该项目的目的是支持和促进女性和少数民族学生和教师参与南加州大学的学术生活。在整个项目中，PI还将涉及来自洛杉矶地区的高中生。

PI: Eliasson, VeronicaProposal Number: 1437412The goal of the proposed experimental study is to investigate the interaction of shock waves with liquids and to discover ways to mitigate shock wave effects. This proposal is aimed at the investigation of how shock wave attenuation can be obtained by adding liquid sheets in specific geometric shapes in the path of a propagating shock wave. The fundamental work proposed here can have applications on designing cheap and reliable methods to protect buildings, vehicles, and humans from threats of shock and blast wave impact. For example, it can have an impact in the construction and mining industries where blast technology, explosives and detonation are important. Accidents in both surface and underground mines can lead to shock wave propagation with devastating effects, therefore, shock wave attenuation should be promoted to reduce damage and injury.The primary research objectives are (a) to understand the dynamics between the incident shock wave and the free surface, and (b) to explore and quantify how the degree of attenuation depends on the role of Newtonian and non-Newtonian fluids and their mass, as well as thermal and inertial properties. Direct measurements of shock wave amplitude, peak pressure, total impulse in addition to quantitative and qualitative high-speed shock wave imaging will be obtained for all cases. Gaining such fundamental understanding can lead to methodologies to reduce shock impact using available and environmentally friendly liquids. Experiments will be performed in a shock tube, and numerical simulations will be performed using a finite volume approach. In terms of outreach and education, the proposal includes a well-articulated plan to involve graduate and undergraduate students in research. The Pi will work with the WiSE Program (Women in Science and Engineering) at the U of South California, whose purpose is to support and promote the participation of women and minorities, both students and faculty, in the academic life at USC. The PI will also involve high school students from the Los Angeles area in her research throughout this project.