Abstract

In this study, CFD parameter variations are performed to investigate propeller-wing interactions. For this purpose, the solver TAU of the German Aerospace Center with the integrated Actuator Disk is used. The 2.5D setup studied consists of a wing segment with constant chord length and an Actuator Disk iterated to a constant thrust in all cases. The parameters to be varied are: Position, rotational speed, installation angle and segment width. Lift and drag coefficients and propeller efficiencies are used as result variables. It can be seen that the position of the propeller, its installation angle and the spanwise distance between the propellers have significant influence on the interactions. The rotational speed has hardly any influence on the interactions in the considered range. Positions above the wing chord benefit from high lift coefficients, but at the same time drag increases. An exception is the position centrally above the wing, which is characterized by a strong drag reduction in all parameter combinations. Positions above the leading and trailing edge of the wing show also strong sensitivities to the installation angle. Reducing the distance between the propellers amplifies the existing trends, so that advantages are higher, but disadvantages are also more pronounced.

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