Experiments and Computations on the Lift of Accelerating Flat Plates at Incidence.

Stevens, P R R J; Babinsky, H; Manar, F; Mancini, P; Jones, A R; Nakata, T; Phillips, N; Bomphrey, R J; Gozukara, A C; Granlund, K O; Ol, M V

Abstract

This paper discusses the force history and flow topology of accelerating flat-plate wings. The work is a collaborative effort to study fundamental, unsteady low-Reynolds-number flows. The motion kinematics is designed to be relevant to the micro air vehicle flight regime. A combination of experimental and computational techniques is used to obtain data for comparison. There is a striking correlation of lift history data and flow topology from both experimental and computational data sets. It is found that the leading/trailing-edge vortex core separation during the initial part of a surge motion can be reasonably well approximated by c⋅cosα, and the leading/trailing-edge vortex relative advection velocity is estimated to be 0.5⋅U∞. This leading/trailing-edge vortex relative advection velocity is a useful measure of how quickly the trailing-edge vortex moves away from the leading-edge vortex, which can influence lift for accelerating flat plates at high incidence angles.

Citation

Stevens, P. R. R. J., Babinsky, H., Manar, F., Mancini, P., Jones, A. R., Nakata, T., …Ol, M. V. (in press). Experiments and Computations on the Lift of Accelerating Flat Plates at Incidence. AIAA Journal, 55(10), 3255-3265. https://doi.org/10.2514/1.J055323

• Journal Article Type: Article
• Acceptance Date: May 1, 2017
• Deposit Date: Jul 26, 2017
• Publicly Available Date: Jul 26, 2017
• Journal: AIAA Journal
• Print ISSN: 0001-1452
• Electronic ISSN: 1533-385X
• Publisher: American Institute of Aeronautics and Astronautics
• Peer Reviewed: Peer Reviewed
• Volume: 55
• Issue: 10
• Pages: 3255-3265
• DOI: https://doi.org/10.2514/1.J055323
• Public URL: https://rvc-repository.worktribe.com/output/1392145