The Development of Crossflow Vortices on a 45 Degree Swept Wing Conference Paper uri icon


  • Three-dimensional boundary-layer experiments are currently being conducted on a 45swept wing in the Arizona State University Unsteady Wind Tunnel. Crossflow-dominated transition is produced via a model with contoured end liners to simulate infinite swept-wing flow. Fixed-wavelength stationary and travelling crossflow vortices are observed. The stationary vortex wavelengths vary with Reynolds number as predicted by linear-stability theory but with observed wavelengths which are about 25% smaller than theoretically predicted. The frequencies of the most-amplified moving waves are in agreement with linear-stability theory; travelling waves at higher frequencies than predicted are also observed. These higher-frequency waves may be harmonics of the primary crossflow waves generated by a parametric resonance phenomena. Boundary-layer profiles measured at several spanwise locations show streamwise disturbance profiles characteristic of the crossflow instability. Near the transition location severe distortions of the laminar boundary-layer profiles are observed. Mean-profile measurements are compared to theoretical predictions. Copyright 1989 Society of Automotive Engineers, Inc.

name of conference

  • SAE Technical Paper Series

published proceedings

  • SAE Technical Papers

author list (cited authors)

  • Mousseux, M. C., Dagenhart, J. R., Saric, W. S., & Hoos, J. A.

citation count

  • 1

complete list of authors

  • Mousseux, Marc C||Dagenhart, J Ray||Saric, William S||Hoos, Jon A

publication date

  • December 1989