Author(s)

L. de Luca, G. Cardone & D. Aymer de la Chevalerie

Abstract

Streaky structures and Goertler vortices are detected experimentally in attached flows over 2D concave wall models as well as over 2D (flat plate/ramp) and 3D (delta wing/ramp) wedge models tested in viscous interaction regime. The strong influence of the leading edge geometry upon such structures, confirmed by some ad hoc numerical computations, is stressed. 1 Introduction Centrifugal instability of boundary layer flows may occur over concave curved walls. This instability manifests itself in the form of counter-rotating stream wise vortices that are commonly referred to as Goertler vortices. The study of the Goertler instability is of practical interest since the combined effects of the Tollmien-Schlichting waves and the centrifugal force may drive the transit

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