1. Dissolution kinetics of carbon in aluminum droplet combustion: Implications for aluminized solid propellants
- Author
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Iskender Gökalp, Jean-Claude Rifflet, Vincent Sarou-Kanian, Francis Millot, Centre de recherches sur les matériaux à haute température (CRMHT), Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS), Conseil Régional Centre, and Fonds Social Européen, Objectif 2, 2000–2006
- Subjects
Solid propellant ,Hydrogen ,General Chemical Engineering ,Combustion ,General Physics and Astronomy ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Mineralogy ,02 engineering and technology ,7. Clean energy ,01 natural sciences ,[SPI.MAT]Engineering Sciences [physics]/Materials ,010305 fluids & plasmas ,Adsorption ,0103 physical sciences ,Solid-fuel rocket ,Dissolution ,Propellant ,Atmospheric pressure ,[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment ,[CHIM.MATE]Chemical Sciences/Material chemistry ,General Chemistry ,021001 nanoscience & nanotechnology ,Carbon ,Kinetics ,Fuel Technology ,Chemical engineering ,chemistry ,13. Climate action ,0210 nano-technology ,Aluminum - Abstract
International audience; An analytical model describing the kinetics of carbon dissolution in burning aluminum droplets has been developed in order to simulate its effects under solid rocket motor conditions. A carbon dissolution rate (k) was introduced in different droplet regression laws and depending on the heterogeneous kinetics between the Al sur-face and the surrounding gases. The model was validated using previous experiments performed by the authors on millimeter-sized Al droplets burning in several CO2-containing atmospheres at atmospheric pressure (P=1atm). It has been shown that the carbon dissolution is affected by the presence of hydrogen due to competition betweenCO and H2 chemisorption. The model was then applied to aluminized propellants (AP/HTPB) at high pressures(P=60 atm) and high temperatures (T=3000 and 3500 K), as well as at various burning rates and adsorption conditions. Though the accuracy of the extrapolation results needs further improvement, it has been shown that the carbon dissolution process should not be neglected in order to achieve global understanding of the combustion of Al particles, particularly agglomerates.
- Published
- 2007
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