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Communication Dans Un Congrès Année : 2023

Temperature measurement during the combustion of a single aluminium particle

Résumé

Aluminum is seen as an additional source of energy that can be added to propulsion and explosive systems. Explosions are defined as phenomena that release energy into space faster than it can distribute itself, resulting in the formation of a shock wave. A common example of an explosion is the detonation of a condensed explosive charge. This phenomenon is extremely exothermic and is defined by a reactive shock wave, propagating in the solid explosive, breaking down into the product of detonation. These products, in contact with air, can in turn enter into combustion; this is the afterburning phase. This afterburning phenomenon greatly contributes to the total energy released during the explosion. The use of metallic particles in the composition of explosives makes it possible to reinforce the effects of afterburning. Aluminum has an important role in this phase, when it is used in explosives. Aluminum particles are heated by the detonation wave, then dispersed with the expansion of the gases and burn in a mixture composed of the detonation products and air. Additional heat is then produced within the fireball, making it more energetic. Aluminum particles burn in the mixing zone which is on the periphery of the fireball. This zone is composed of air and detonation products (CO2, CO, H2O). The study of the different reactions, depending on the environment of the particle, is therefore a major challenge for the understanding of aluminized explosives. In this context, the knowledge of information such as the combustion time and the temperature of the condensed phases is essential. To achieve this, we have set up a system to study the combustion of an isolated particle in various gaseous atmospheres. This study is limited to the description of the combustion of aluminum particles in air.
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Dates et versions

hal-04172798 , version 1 (28-07-2023)

Identifiants

  • HAL Id : hal-04172798 , version 1

Citer

Valentin Glasziou, Guillaume Legros, Christian Chauveau, Sébastien Courtiaud, Fabien Halter. Temperature measurement during the combustion of a single aluminium particle. 29th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS 2023), IDERS, Jul 2023, Siheung, South Korea. ⟨hal-04172798⟩
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