Shock Wave Attenuation Using Foam Obstacles: Does Geometry Matter?

Aerospace

Hongjoo Jeon²  Jonathan R. Gross²  Sarah Estabrook²  Stylianos Koumlis²  Qian Wan²  Gauri R. Khanolkar²  Xingtian Tao²  David M. Mensching²  Edward J. Lesnick²  Veronica Eliasson¹ 

[1] Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089, USA;

关键词: shock impact;    shock attenuation;    foam;    schlieren photography;    complex materials;   

DOI  :  10.3390/aerospace2020353

来源: mdpi

【 摘 要 】

A shock wave impact study on open and closed cell foam obstacles was completed to assess attenuation effects with respect to different front face geometries of the foam obstacles. Five different types of geometries were investigated, while keeping the mass of the foam obstacle constant. The front face, i.e., the side where the incident shock wave impacts, were cut in geometries with one, two, three or four convergent shapes, and the results were compared to a foam block with a flat front face. Results were obtained by pressure sensors located upstream and downstream of the foam obstacle, in addition to high-speed schlieren photography. Results from the experiments show no significant difference between the five geometries, nor the two types of foam.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.