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

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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. / ... [more]

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 $c \cdot \cos α$ , and the leading/trailing-edge vortex relative advection velocity is estimated to be $0.5 \cdot U_{\infty}$ . 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.

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Document information

Title :

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

Contributors:

Stevens, P. R. R. J. (author) / Babinsky, H. (author) / Manar, F. (author) / Mancini, P. (author) / Jones, A. R. (author) / Nakata, T. (author) / Phillips, N. (author) / Bomphrey, R. J. (author) / Gozukara, A. C. (author) / Granlund, K. O. (author)

Published in:

AIAA Journal ; 55 , 10 ; 3255-3265

Publication date :

2017-07-18

Size :

11 pages

ISSN :

0001-1452 , 1533-385X

DOI :

https://doi.org/10.2514/1.J055323

Type of media :

Article (Journal)