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.
Original language | English |
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Title of host publication | 54th 3AF International Conference AERO2019 At: Paris, France |
Number of pages | 8 |
Publication status | Published - 27 Mar 2019 |
Event | 54th 3AF International Conference on Applied Aerodynamics - Paris, France Duration: 25 Mar 2019 → 27 Mar 2019 Conference number: 54 http://3af-aerodynamics2019.com/ |
Conference
Conference | 54th 3AF International Conference on Applied Aerodynamics |
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Abbreviated title | AERO 2019 |
Country/Territory | France |
City | Paris |
Period | 25/03/19 → 27/03/19 |
Internet address |