SA
S. Aurori
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2 records found
1
Master thesis
(2026)
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S. Aurori, F. De Domenico, A. Cervone, G. la Rocca, Wolter Wieling, Ronald Veraar
The regression rate of Solid Fuel Ramjet solid fuels can be modified through use of additives. An experimental direct-connect test campaign was conducted to determine the effects of aluminium, copper oxide and expandable graphite additives, each added in a 3% concentration to an HTPB baseline formulation. Regression rates were measured at four axial locations using ultrasound sensors. Tests were performed at constant air mass flow, with varying inlet air temperature and combustor pressures. Expandable graphite increased regression rate by 22.9%, while copper oxide resulted in an 8.6% increase. Aluminium showed no statistically significant effect. The effect of expandable graphite was also influenced by the combustor pressure and axial location in the combustor. Under high-pressure conditions, erratic burning behaviour near the nozzle produced high regression rates, and was accompanied by pressure oscillations and textured fuel surfaces. This phenomenon obscured the effects of all additives. Overall, expandable graphite and copper oxide significantly enhanced HTPB fuel regression rates, although their effectiveness depended strongly on testing conditions.
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The regression rate of Solid Fuel Ramjet solid fuels can be modified through use of additives. An experimental direct-connect test campaign was conducted to determine the effects of aluminium, copper oxide and expandable graphite additives, each added in a 3% concentration to an HTPB baseline formulation. Regression rates were measured at four axial locations using ultrasound sensors. Tests were performed at constant air mass flow, with varying inlet air temperature and combustor pressures. Expandable graphite increased regression rate by 22.9%, while copper oxide resulted in an 8.6% increase. Aluminium showed no statistically significant effect. The effect of expandable graphite was also influenced by the combustor pressure and axial location in the combustor. Under high-pressure conditions, erratic burning behaviour near the nozzle produced high regression rates, and was accompanied by pressure oscillations and textured fuel surfaces. This phenomenon obscured the effects of all additives. Overall, expandable graphite and copper oxide significantly enhanced HTPB fuel regression rates, although their effectiveness depended strongly on testing conditions.
Bachelor thesis
(2023)
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L. Alonso Antona, S. Aurori, M. Beenders, E.G. Chen, C.F.M. Kendall, D.J.D. Norbart, T. Odijk, M.H. Rusch, L.M.N. Tabaksblat, S. Yorucu, I. Akay, A.O. Başkaya, P. Piron
The goal of project Altus is to do an in-situ investigation of Polar Mesospheric Clouds (PMCs). These clouds form around an altitude of 84 km, and only for 60 to 80 days per year, during the summer. Normally, these clouds only form in the polar regions, from around 50◦ latitude north and south. Recently, however, PMCs have been observed as low as 40◦ north. There are theories linking this change in location, and other unexpected behaviours of PMCs, to climate change. However, further research is still required to confirm these theories. As these changes are happening at a slow rate, a database of PMC measurements would be extremely beneficial to track indicator values over time. Project Altus sets out to bridge this knowledge gap by taking regular measurements of PMCs over an extended period of time.
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The goal of project Altus is to do an in-situ investigation of Polar Mesospheric Clouds (PMCs). These clouds form around an altitude of 84 km, and only for 60 to 80 days per year, during the summer. Normally, these clouds only form in the polar regions, from around 50◦ latitude north and south. Recently, however, PMCs have been observed as low as 40◦ north. There are theories linking this change in location, and other unexpected behaviours of PMCs, to climate change. However, further research is still required to confirm these theories. As these changes are happening at a slow rate, a database of PMC measurements would be extremely beneficial to track indicator values over time. Project Altus sets out to bridge this knowledge gap by taking regular measurements of PMCs over an extended period of time.