Effects of step excrescences on a swept wing in a low-disturbance wind tunnel Conference Paper uri icon


  • A 30 swept-wing model with a movable, leading-edge extending to 15% chord is used in low-disturbance wind-tunnel tests to study the effect of two-dimensional, step excrescences in a three-dimensional boundary layer. Forward- and aft-facing steps are modulated during the tests. Pressure measurements are compared with computational results, infrared thermography is used to globally detect boundary-layer transition, and hotwire measurements provide details of the boundary-layer profiles in the vicinity of the steps. An analysis of the results is provided including data from tests in a flight environment and from experimental studies of an unswept model of equivalent 2-D pressure gradient.

published proceedings

  • 52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014

author list (cited authors)

  • Duncan, G. T., Crawford, B. K., Tufts, M. W., Saric, W. S., & Reed, H. L.

complete list of authors

  • Duncan, GT||Crawford, BK||Tufts, MW||Saric, WS||Reed, HL

publication date

  • January 2014