Effects of Step Excrescences on a Swept Wing in a Low-Disturbance Wind Tunnel
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© 2015, American Institute of Aeronautics and Astronautics Inc. All rights reserved. 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.
author list (cited authors)
Duncan, G. T., Crawford, B., Tufts, M. W., Saric, W. S., & Reed, H. L.