Experimental validation of shock propagation through a foam with engineered macro-pores
| Autor: | Pawel Kozlowski, J. Velechovsky, Yong Ho Kim, Samuel Jones, Brian Haines, Tana Cardenas, J. M. Smidt, R. E. Olson, L. M. Green, T. H. Day, Douglas Woods, Thomas J. Murphy, M.R. Douglas, Brian J. Albright, Robert Gore |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 28:012702 |
| ISSN: | 1089-7674 1070-664X |
| DOI: | 10.1063/5.0024697 |
| Popis: | The engineered macro-pore foam provides a new way to study thermonuclear burn physics by utilizing capsules containing deuterated (D) foam and filling tritium (T) gas in the engineered macro-pores. The implosion of a thermonuclear capsule filled with an engineered macro-pore foam will be complex due to the interaction of a shock wave with the engineered macro-pores. It is our goal to quantify how substantially complex foam structures affect the shape of shock and bulk shock speed. A cylinder-shape shock tube experiment has been designed and performed at the Omega Laser Facility. In order to examine how a foam structure will affect shock propagation, we performed several tests varying (1) engineered macro-pore size, (2) average foam density, and (3) with/without neopentane (C5H12) gas. X-ray radiographic data indicate that shock speed through engineered macro-pore foams depends strongly on average foam density and less on pore size. Experimental shock propagation data helped guide two numerical simulation approaches: (1) a 2D simulation with homogenizing foams rather than explicitly simulating engineered macro-pores and (2) a 2D toroidal-pore approximation adopting a toroidal-tube geometry to model engineered macro-pores. |
| Databáze: | OpenAIRE |
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