Print Email Facebook Twitter Coherent vortex structures over a rotating spinner under non-axial inflows at low Reynolds number Title Coherent vortex structures over a rotating spinner under non-axial inflows at low Reynolds number Author Tambe, S.S. (TU Delft Flight Performance and Propulsion) Schrijer, F.F.J. (TU Delft Aerodynamics) Gangoli Rao, A. (TU Delft Flight Performance and Propulsion) Veldhuis, L.L.M. (TU Delft Flight Performance and Propulsion) Date 2019-03-27 Abstract Boundary layer instabilities and the formation of coherent spiral vortices over a rotating cone and ellipsoid are studied experimentally. It is found that under a non-axial inflow, the breaking of symmetry in the flow field significantly disturbs the coherence and delays the formation of spiral vortices to higher local Reynolds numbers (Re_l) and higher rotation ratios (S). Consequently, it also delays boundary layer transition region. A conceptual reasoning for the observed phenomena is given based on the sensitivity of the local spiral vortex characteristics (number n and angle ϵ) to the asymmetry in the local rotation ratios. To reference this document use: http://resolver.tudelft.nl/uuid:13ac005c-e8c3-40eb-96fd-69972df4ec70 Source 54th 3AF International Conference AERO2019 At: Paris, France Event 54th 3AF International Conference on Applied Aerodynamics, 2019-03-25 → 2019-03-27, Paris, France Part of collection Institutional Repository Document type conference paper Rights © 2019 S.S. Tambe, F.F.J. Schrijer, A. Gangoli Rao, L.L.M. Veldhuis Files PDF AERO2019_45_S._TAMBE_P.pdf 1.35 MB Close viewer /islandora/object/uuid:13ac005c-e8c3-40eb-96fd-69972df4ec70/datastream/OBJ/view