It has been known for some time that an appropriately designed compliant wall (artificial dolphin skin) is highly effective for laminar flow control in low-disturbance environments. Unfortunately, compliant walls are not really practical for aeronautical applications. Accordingly, we focus here on marine applications. The marine environment tends to have much higher levels of freestream turbulence than found in flight conditions typical of cruise. Herein, we explore the effects of freestream turbulence on laminar—turbulent transition. In particular, we investigate the velocity streaks generated in the boundary layer by freestream turbulence. Furthermore, we carry out a numerical-simulation study of the effects of wall compliance on the velocity streaks. We find that boundary layers over compliant walls are much less receptive to streaks than those over a rigid surface. This implies that compliant walls should be effective at laminar flow control even in environments with relatively high levels of freestream turbulence.
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Carpenter, P.W. (2008). Recent Progress in the Use of Compliant Walls for Laminar Flow Control. In: Bonilla, L.L., Moscoso, M., Platero, G., Vega, J.M. (eds) Progress in Industrial Mathematics at ECMI 2006. Mathematics in Industry, vol 12. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-71992-2_13
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