The near-wake of discrete roughness elements on swept wings

The near-wake of discrete roughness elements on swept wings: Tomographic PTV measurements

Zoppini, G. (TU Delft Aerodynamics)
Michelis, Theodorus (TU Delft Aerodynamics)
Ragni, D. (TU Delft Wind Energy)
Kotsonis, M. (TU Delft Aerodynamics)

2022

This work presents the first reported experimental characterization of the flow field in the direct vicinity of discrete roughness elements (DRE), in a swept wing boundary layer. High magnification tomographic Particle Tracking Velocimetry (3D-PTV) measurements are used to acquire time-averaged velocity and standard deviation fields in a 3D volume directly aft of the DRE elements. The collected data detail the near-element flow topology, providing information on the developing wake and emerging flow structures, their organization and amplitude evolution. A transient growth behaviour is identified in the element wake, while onset and growth of crossflow instabilities is observed further downstream. As such, the near element flow is confirmed to be a fundamental part of the receptivity process, contributing in setting the initial amplitudes for the crossflow instability evolution.

http://resolver.tudelft.nl/uuid:696e5ee9-db20-4e93-b9da-29c2e86d4643

2023-06-01

12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022, 2022-07-19 → 2022-07-22, Osaka, Virtual, Japan

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

conference paper

© 2022 G. Zoppini, Theodorus Michelis, D. Ragni, M. Kotsonis