Roughness receptivity in swept-wing boundary layers computations Academic Article uri icon


  • The crossflow instability responsible for transition over a swept wing has been found to be ultra-sensitive to micron-sized roughness at the leading edge. Transition-predictive tools are limited because of the lack of models connecting physical roughness characteristics with initial and boundary conditions needed by the computational codes. The Texas A&M Flight Research Lab (FRL) is currently conducting flight tests of a laminar flow 30 swept wing model (SWIFT swept wing in flight tests) mounted vertically below the port wing hard-point of a Cessna O-2A Skymaster and operated at chord Reynolds numbers on the order of 7.5 million. Various roughness configurations are correlated with local skin-friction measurements downstream. As a companion to the flight experiments, the group has engaged in a computational study aimed at relating roughness features to the resulting initial amplitude of the instability. This will provide a critical connection between stability analysis design tools and transition location prediction. 2010 Inderscience Enterprises Ltd.

published proceedings

  • International Journal of Engineering Systems Modelling and Simulation

author list (cited authors)

  • Rhodes, R. G., Reed, H. L., Saric, W. S., Carpenter, A. L., & Neale, T. P.

citation count

  • 21

complete list of authors

  • Rhodes, Richard G||Reed, Helen L||Saric, William S||Carpenter, Andrew L||Neale, Tyler P

publication date

  • January 2010