Abstract
A laminar boundary layer has a relatively low skin-friction drag coefficient (c f ) with respect to a turbulent one, and for increasing Reynolds number the difference in c f rapidly increases, and the difference can easily amount to an order of magnitude in many industrial applications. This explains why there is a tremendous interest in being able to delay transition to turbulence, particularly by means of a passive mechanism, which has the advantage of accomplishing the control without adding any extra energy into the system. Moreover, a passive, control does not have to rely on typically complicated sensitive electronics in sensor-actuator systems. Within the AFRODITE project [3] we now present the first experimental results where we are able to show that miniature vortex generators (MVGs) are really coveted devices in obtaining transition delay.
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References
Cossu, C., Brandt, L.: On Tollmien-Schlichting-like waves in streaky boundary layers. Eur. J. Mech. /B Fluids 23, 815–833 (2004)
Fransson, J.H.M., Brandt, L., Talamelli, A., Cossu, C.: Experimental study of the stabilisation of Tollmien-Schlichting waves by finite amplitude streaks. Phys. Fluids 17, 054,110 (2005)
Fransson, J.H.M., Fallenius, B.E.G., Shahinfar, S., Sattarzadeh, S.S., Talamelli, A.: Advanced fluid research on drag reduction in turbulence experiments afrodite. J. Phys.: Conf. Ser. 318, 032,007 (2011)
Fransson, J.H.M., Talamelli, A., Brandt, L., Cossu, C.: Delaying transition to turbulence by a passive mechanism. Phys. Rev. Lett. 96, 064,501 (2006)
Lindgren, B., Johansson, A.V.: Evaluation of the flow quality in the mtl wind-tunnel. Technical Report KTH/MEK/TR–02/13–SE, KTH, Department of Mechanics, Stockholm (2002)
Schlatter, P., Deusebio, E., de Lange, R., Brandt, L.: Numerical study of the stabilisation of boundary-layer disturbances by finite amplitude streaks. Int. J. Flow Contr. 2, 259–288 (2010)
Shahinfar, S., Sattarzadeh, S.S., Fransson, J.H.M., Talamelli, A.: Revival of classical vortex generators now for transition delay. Phys. Rev. Lett. 109, 074,501 (2012)
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© 2014 Springer International Publishing Switzerland
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Fransson, J.H.M., Shahinfar, S., Sattarzadeh, S.S., Talamelli, A. (2014). Transition to Turbulence Delay Using Miniature Vortex Generators – AFRODITE –. In: Talamelli, A., Oberlack, M., Peinke, J. (eds) Progress in Turbulence V. Springer Proceedings in Physics, vol 149. Springer, Cham. https://doi.org/10.1007/978-3-319-01860-7_12
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DOI: https://doi.org/10.1007/978-3-319-01860-7_12
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-01859-1
Online ISBN: 978-3-319-01860-7
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