Description and Report on the Calibration of an Unsteady Flow Wind Tunnel, Part 1. The Unsteady Lift Generated on an Airfoil at Moderate Incidence to a Flow Containing Streaming Oscillations, Part 2

摘要

A first set of velocity and pressure measurements made in an unsteady flow wind tunnel are presented. The wind tunnel provides a low speed mean flow superimposed streamwise oscillations of variable amplitude generated by rotating vanes at the downstream end. The fluctuating lift on an unstalled airfoil at incidence in an unsteady streamwise flow was measured and compared with predictions of unsteady thin airfoil theory.