Passive Laminar Flow Control at Low Turbulence Levels Academic Article uri icon


  • Spanwise arrays of discrete roughness elements (DRE) are used in wind tunnel and flight experiments to excite stationary crossflow vortices. Because flight turbulence intensities are low, the stationary crossflow mode dominates the traveling mode in that environment and leaves surface roughness as the important initiator of stationary crossflow vortices. The potential for passive control of the crossflow instability stimulated a series of wind-tunnel and flight experiments examining this prospect. In addition to nonlinear saturation of the disturbance amplitudes, several important observations regarding the DRE array were made. Previous wind-tunnel experiments in which DRE transition control was effective were conducted in a freestream turbulence intensity of approximately.

published proceedings


author list (cited authors)

  • Lovig, E. N., Downs, R. S., & White, E. B.

citation count

  • 13

complete list of authors

  • Lovig, Erica N||Downs, Robert S||White, Edward B

publication date

  • May 2014