Aerodynamic Investigation on Efficient Inflight Transition of a Propeller from Propulsion to Regeneration Mode

Authors:
  • LGLeo Girbig
    Leo Girbig
  • FWFrederik Wendland
    Frederik Wendland
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Abstract
View Video Presentation: https://doi.org/10.2514/6.2022-0546.vid This paper discusses a new way of inflight power regeneration for electric or hybrid-electric driven general aviation aircraft with one powertrain for both configurations. Three different approaches for the shift from propulsion to regeneration mode are analyzed. Numerical cal-culation and wind tunnel results are compared and show the highest regeneration potential for the "Windmill" approach, where the propeller blades are flipped, and rotation is reversed. A combination of all regeneration approaches for a realistic flight mission is discussed.