Print Email Facebook Twitter Effects of micro-ramps on a shock wave/turbulent boundary layer interaction Title Effects of micro-ramps on a shock wave/turbulent boundary layer interaction Author Blinde, P.L. Humble, R.A. Van Oudheusden, B.W. Scarano, F. Faculty Aerospace Engineering Department Aerospace Design, Integration and Operations Date 2009-09-24 Abstract Stereoscopic particle image velocimetry is used to investigate the effects of micro-ramp sub-boundary layer vortex generators, on an incident shock wave/boundary layer interaction at Mach 1.84. Single- and double-row arrangements of micro-ramps are considered. The micro-ramps have a height of 20% of the unperturbed boundary layer thickness and the measurement planes are located 0.1 and 0.6 boundary layer thicknesses from the wall. The micro-ramps generate packets of individual vortex pairs downstream of their vertices, which produce counter-rotating longitudinal streamwise vortex pairs in a time-averaged view. These structures induce a pronounced spanwise variation of the flow properties, namely the mixing across the boundary layer interface. The probability of reversed-flow occurrence is decreased by 20 and 30% for the single- and double-row configurations, respectively. Both configurations of micro-ramps stabilize the shock motion by reducing the length of its motion by about 20% in the lower measurement plane. The results are summarized by a conceptual model describing the boundary layer’s and interaction’s flow pattern under the effect of the micro-ramps. Subject Shock wave boundary layer interactionFlow controlMicrorampsPIV To reference this document use: http://resolver.tudelft.nl/uuid:98e819cb-db63-4aad-8780-c3dd7b763a93 Publisher Springer ISSN 1432-2153 Source Shock Waves, 19 (6) Part of collection Institutional Repository Document type journal article Rights (c) 2009 Blinde, P.L.; Humble, R.A.; Van Oudheusden, B.W.; Scarano, F. Files PDF blinde_2009.pdf 1.58 MB Close viewer /islandora/object/uuid:98e819cb-db63-4aad-8780-c3dd7b763a93/datastream/OBJ/view