Jens KUNZE, Allan PAULL

DOI Number: 10.60853/b15z-3b20

Conference number: HiSST-2024-00109

An analysis of a supersonic propeller driven by an electric motor is performed. The analysis is aimed at evaluating the aerodynamic performance of a propeller blade and inform design. Recent and continuing progress in electric energy storage systems and electric motors as well as materials have opened up the design space for a large number of applications. So, too, for electrically powered flight. A propeller is the simplest method of converting electric energy into aerodynamic thrust. In this study, a two dimensional analytic model is used to calculate the performance of various propeller blades. This is used to explore the design space and to show that reasonable efficiency can be achieved at flight Mach numbers from 2 to 6 between 15 and 35 km altitude. The analytic results are then compared to three dimensional calculations using computational fluid dynamics. The results are promising and show that the efficiencies predicted by the simple model are confirmed and in some cases exceeded by the more complex one, albeit at higher rotational speeds. Finally, the results are summarised and the conclusions drawn from the presented calculations are used to inform the design of a propeller blade.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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