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Theses

Combustion confinée d'explosif condensé pour l'accélaration de projectile. Application en pyrotechnie spatiale

Abstract : Opto-pyrotechnics (ignition of detonation by optical systems) is one of the most promising innovations to improve reliability, safety and performances on future space launchers. This thesis aims at studying and modeling the first stage from a two-stage opto-pyrotechnic detonator that consists of a condensed explosive confined in a closed combustion chamber, in which the beginning of a Deflagration-to-Detonation Transition occurs. The laser ignition of the explosive and its isochoric combustion are modeled by the EFAE code. This code is coupled with LS-DYNA software to deal with the deformation and the rupture of the metallic disk that closes the combustion chamber, and then with the subsequent propulsion of the projectile to the second stage. In parallel, various experimental technics (gas adsorption, photonic Doppler velocimetry, microscopy) have underlined several physical processes that allow first to test the coupling between EFAE and LS-DYNA, then to determine and classify influent parameters that affect the industrial specifications.
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https://tel.archives-ouvertes.fr/tel-01060036
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Submitted on : Tuesday, September 2, 2014 - 3:37:09 PM
Last modification on : Tuesday, June 4, 2019 - 6:21:30 PM
Long-term archiving on: : Wednesday, December 3, 2014 - 10:53:03 AM

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Julien Nicoloso. Combustion confinée d'explosif condensé pour l'accélaration de projectile. Application en pyrotechnie spatiale. Autre. ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechique - Poitiers, 2014. Français. ⟨NNT : 2014ESMA0007⟩. ⟨tel-01060036⟩

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