D.P. Seyfert, U. Deck, J. Geiger

Interaction effects between tractor propellers and wings have gained renewed attention in recent years due to the energetic advantage propeller-driven configurations offer compared to conventional jet engines in low to mid speed flight scenarios. While much of the existing research focuses on global effects, such as swirl recovery and vortex attenuation, previous publications suggest that viscous effects, particularly those concerning boundary layer development, can be equally important in optimizing the aerodynamic performance. Traditionally, it has been assumed that a propeller´s turbulent wake causes the boundary layer of the adjacent wing to become fully turbulent. It has, however, been demonstrated, that laminar flow can persist in certain regions of the boundary layer, even in the vicinity of a propeller wake through a effect known as boundary layer relaxation. By this, the drag advantage offered by airfoils which are designed to maintain an extended area of laminar flow can be partially achieved for propeller-driven aircraft. In this paper, an experimental design is presents which aims to investigate the interaction between a propeller wake and a natural laminar flow (NLF) airfoil. First, the current state of research is laid-out to provide context for the integration of NLF wings and propellerdriven configurations. Based on these insights, specific requirements for the experimental setup are derived. Finally, measurement data for a reference configuration is provided, offering a comparative dataset for upcoming measurements.

Deutscher Luft- und Raumfahrtkongress 2024, Hamburg

Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2024

Conference Paper

englisch

21,0 x 29,7 cm, 10 Seiten

urn:nbn:de:101:1-2411131455584.208133301907

10.25967/630099

Aerodynamics, Experiment, Boundary Layer, Propeller, Interaction

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Seyfert, D.P.; Deck, U.; Geiger, J. (2024): Unsteady Effects of a Tractor Propeller on a Laminar Wing: an Experimental Setup. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). https://doi.org/10.25967/630099. urn:nbn:de:101:1-2411131455584.208133301907.

13.11.2024