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Aerodynamic Design of a Ducted Contra-Rotating Fan

Current developments of eVTOL- and lightweight hybrid airplanes require new propulsion systems. Ducted contra-rotating fans are one option for compact, efficient, low noise electric driven aero engines.

In this general case study, we will present the aerodynamic design of a 500N thrust system using CFturbo for the design and CFturbo SMP for 3D flow simulations. Our target is to design a ducted contra-rotating fan with more power and better efficiency at lower rotational speed than a conventional single-stage axial fan with or without stator vanes.


Christopher Sands and Ralph Peter Mueller
March 2022