Summary
Spatial direct numerical simulations based on the incompressible unsteady Navier-Stokes equations are employed to explore aspects related to discrete suction through holes and hole arrays in a 3-d boundary layer. The studies focus on disturbance generation, downstream development of these disturbances and oversuction. It turns out that suction holes generate in any case growing crossflow-vortex eigenmodes. Simple cancellation strategies like staggered hole orders working successfully in 2-d boundary layers fail due to the varying dispersion properties of the 3-d boundarylayer flow. Premature transition through oversuction may occur and is caused by a convective secondary instability of the flow field deformed by strong steady suctioninduced crossflow vortices.
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Messing, R., Kloker, M. (2004). DNS study of discrete suction in a 3-D boundary layer. In: Wagner, S., Kloker, M., Rist, U. (eds) Recent Results in Laminar-Turbulent Transition. Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM), vol 86. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45060-3_14
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DOI: https://doi.org/10.1007/978-3-540-45060-3_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-07345-8
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