Summary
The crossflow induced laminar-turbulent transition of a 3-D flat-plate boundary-layer flow is investigated by means of spatial direct numerical simulations based on the complete incompressible 3-D Navier-Stokes equations and a combined 6th-order compact Finite-Difference / spanwise Fourier-spectral scheme. The considered spanwise-invariant laminar base flow is a model of the boundary-layer flow in the front region of an infinite swept wing, with favorable and ensuing adverse chordwise pressure gradient. The secondary instability of (i) a saturated steady crossflow-vortex packet and (ii) a saturated unsteady crossflow-wave packet is investigated in detail. For (i), transition delay by means of a 3-D upstream flow deformation is presented.
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Wassermann, P., Kloker, M., Wagner, S. (2002). Secondary Instability of Steady and Unsteady Crossflow Waves. In: Wagner, S., Rist, U., Heinemann, HJ., Hilbig, R. (eds) New Results in Numerical and Experimental Fluid Mechanics III. Notes on Numerical Fluid Mechanics (NNFM), vol 77. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45466-3_30
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DOI: https://doi.org/10.1007/978-3-540-45466-3_30
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-53642-7
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