Toward A Generalized Roughness-Induced-Transition Mitigation Strategy Using A Streamwise Array of 2D Flat Strips. Conference Paper uri icon

abstract

  • 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. Boundary layer transition induced by environmentally accumulated roughness such as insect impacts can significantly affect the efficiency of aircraft, helicopters and wind turbines. While there has been some progress in understanding RIT caused by discrete and distributed roughness elements, and some novel control ideas have been proposed, RIT suppression continues to remain a challenge for a realistic situation of arbitrary roughness geometry and location. In this paper we explore an extension of the recent results of Suryanarayanan et al., AIAA 2017-4417, to a generalized solution involving a streamwise array of 2D strips of subcritical height, aligned perpendicular to the flow. We carry out direct numerical simulations using the immersed boundary method and hot wire anemometry experiments at the Klebanoff-Saric Wind Tunnel to demonstrate this generalized RIT control strategy and explore the underlying mechanisms.

name of conference

  • 2018 Fluid Dynamics Conference

published proceedings

  • 2018 Fluid Dynamics Conference

author list (cited authors)

  • Suryanarayanan, S., Goldstein, D. B., Berger, A., White, E. B., & Brown, G. L.

citation count

  • 3

complete list of authors

  • Suryanarayanan, Saikishan||Goldstein, David B||Berger, Alexandre||White, Edward B||Brown, Garry L

publication date

  • January 2018