Print Email Facebook Twitter Experimental Investigation of Aerodynamic Interactions of a Wing with Deployed Fowler Flap under Influence of a Propeller Slipstream Title Experimental Investigation of Aerodynamic Interactions of a Wing with Deployed Fowler Flap under Influence of a Propeller Slipstream Author Duivenvoorden, R.R. (TU Delft Flight Performance and Propulsion; TU Braunschweig) Suard, Noah (Student TU Delft) Sinnige, T. (TU Delft Flight Performance and Propulsion) Veldhuis, L.L.M. (TU Delft Flow Physics and Technology; TU Delft Flight Performance and Propulsion) Department Flow Physics and Technology Date 2022 Abstract Experiments were performed using a wall-to-wall unswept and untapered wing with a single slotted flap and a propeller, to obtain a validation dataset and gain insight into primary flow phenomena in propeller-wing-flap interactions. Measurements were taken using pressure taps, a wake rake and oil flow visualization, for several flap deflections (0, 15 and 30 degrees) and thrust settings (unpowered, J = 0.8 / T c = 1.05 and J = 1.0 / T c = 0.45). Similarity of the measured data to similar experiments was poor, which was believed to be due to the low Reynolds number of Re = 6e5 and sensitivity of local measurements due to occurrence of stall cells. Oil flow visualizations showed significant induction of flow separation from nacelle-wing interactions in unpowered conditions, traced to boundary layer growth. For powered cases it was shown that both sides of the deployed flap are immersed in the part of the slipstream that passes the pressure side of the main element. This part of the slipstream deforms significantly before it reaches the flap and thus results in complex spanwise variations for the flap flow. This stresses the need to investigate slipstream development in propeller-wing-flap systems and the effects on flap flow specifically to gain in-depth understanding of the interactions. The results presented in this paper expose the inherent complexity of investigating propeller-wing-flap systems and gaining viable validation data, and might serve to guide for future investigations of propeller-wing-flap systems. To reference this document use: http://resolver.tudelft.nl/uuid:3ec3134b-1dab-484c-9b2d-846bc4be870a DOI https://doi.org/10.2514/6.2022-3216 Publisher American Institute of Aeronautics and Astronautics Inc. (AIAA) Embargo date 2023-01-02 ISBN 978-1-62410-635-4 Source AIAA AVIATION 2022 Forum: June 27-July 1, 2022, Chicago, IL & Virtual Event AIAA AVIATION 2022 Forum, 2022-06-27 → 2022-07-01, Chicago, United States Series AIAA AVIATION 2022 Forum Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2022 R.R. Duivenvoorden, Noah Suard, T. Sinnige, L.L.M. Veldhuis Files PDF 6.2022_3216.pdf 6.76 MB Close viewer /islandora/object/uuid:3ec3134b-1dab-484c-9b2d-846bc4be870a/datastream/OBJ/view