Stability analysis of the flow past miniature vortex generators in a Blasius boundary layer |
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| Authors: | Lorenzo Siconolfi Simone Camarri Jens H. M. Fransson |
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| Affiliation: | 1. Dipartimento di Ingegneria Civile ed Industriale, Università di Pisa, I−56122 Pisa, Italy;2. Linnè Flow Centre, KTH-Royal Institute of Technology, SE-10044 Stockholm, Sweden |
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| Abstract: | It is shown in the literature that Tollmien−Schlichting waves can be damped and transition delayed by a proper modulation of the streamwise velocity in a boundary layer (BL), which can be obtained using miniature vortex generators (MVGs). Experiments show that the amplitude of TS waves is not always monotonically damped past the MVGs. In this study, direct numerical simulations and local stability analysis have been performed in order to provide an interpretation of the experiments and to characterize further the stabilization mechanism induced by this type of control. (© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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