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Utilisation de la combustion métallique dans les machines thermiques

Abstract : Given the concerns regarding fossil fuel consumption, climate change, and energy security, automakers are exploring new drivetrain concepts. Several of those concepts, such as hydrogen or batteries, have been proposed, however none of them present a performance comparable to hydrocarbons in terms of autonomy, refill time, and safety. In this context, metal fuels, due to their high energy densities, have great potential as energy carriers for automotive applications. They can burn to release heat without any carbon chemistry, and the oxide formed by combustion can be recycled. The objective of this thesis is to contribute to the understanding of this potential. For such, various metal powders were selected and their combustion characteristics were studied in a spherical chamber at constant volume. Thereafter, the aluminum powder deemed most interesting was selected, and a dust burner capable of stabilizing metal-air flames was designed. Various optical diagnostics were conducted in order to measure the properties of aluminum-air flames and aluminum/methane-air flames stabilized on the burner. The results obtained in those different experimental configurations show a predominance of gas phase reactions during the combustion of 7mm aluminum particles. The laminar burning velocity was obtained through a laser tomography setup, and compared to previous works in the literature. It is shown that aluminum can be as reactive as hydrocarbons, and has great potential as a dense, clean, and renewable energy carrier.
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  • HAL Id : tel-01622621, version 1

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Ricardo Lomba. Utilisation de la combustion métallique dans les machines thermiques. Autre. Université d'Orléans, 2016. Français. ⟨NNT : 2016ORLE2080⟩. ⟨tel-01622621⟩

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