Engineering Mechanics

International Conference

Proceedings Vol. 19 (2013)


ENGINEERING MECHANICS 2013

19th INTERNATIONAL CONFERENCE
May 13 – 16, 2013, Svratka, Czech Republic
;
Editors: Igor Zolotarev and Vojtěch Radolf

Copyright © 2013 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

ISBN 978-80-87012-47-5 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

UNSTEADY AERODYNAMIC FORCES MEASURED ON A FLUTTERING PROFILE
Vlček V., Zolotarev I., Kozánek J.
pages 650 - 658, full text

The evaluations of optical measurements of the flow field near the fluttering profile NACA0015 with two-degrees of freedom are presented. Mach number of the airflow was M = 0.21 and M = 0.45, the boundaries of the flutter occurrence. Aerodynamic forces acting on the profile were evaluated in the drag and lift components which enabled to obtain independently the forces corresponding to the upper and lower surfaces of the profile. Using the mentioned decomposition, the new information about mechanism of flutter properties was obtained. The force effects on the upper and lower surfaces are in opposite phases and they are partially eliminated as a result of the circulation around the profile. The cycle changes of this forces cause the permanent energy contribution from the airflow to the vibrating system


back to list of papers

Text and facts may be copied and used freely, but credit should be given to these Proceedings.

All papers were reviewed by members of the scientific committee.


imce   Powered by Imce 3.13  © 2020, Pavel Formánek, Institute of Thermomechanics AS CR, v.v.i. [generated: 0.0217s]