Abstract
We numerically examine the use of Gurney flap to modify the two-dimensional wake dynamics for lift enhancement on NACA 0000 (at plate), 0006, 0012 and 0018 airfoils. Incompressible flows over the airfoils at different angles of attack are considered at Re = 1000. It is observed that the attachment of the Gurney flap at the trailing edge is able to enhance the lift force experienced by the airfoil appreciably with increase in Gurney flap height. The lift-to-drag ratio of the airfoils is also observed to increase at lower angles of attack. The lift spectra and airfoil wake are examined to reveal the effect of the Gurney flap on the formation of different characteristic wake modes and the associated change in the aerodynamic forces exerted on the airfoils. Based on the observations, we classify the resulting wakes into four distinct modes. The emergence of these modes (steady, 2S, P and 2P) are mapped over a wide range of angles of attack and Gurney flap heights for all four airfoils in consideration.
Original language | English |
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Title of host publication | AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting |
Publisher | American Institute of Aeronautics and Astronautics Inc. |
ISBN (Electronic) | 9781624104473 |
DOIs | |
State | Published - 2017 |
Externally published | Yes |
Event | 55th AIAA Aerospace Sciences Meeting - Grapevine, United States Duration: Jan 9 2017 → Jan 13 2017 |
Publication series
Name | AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting |
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Conference
Conference | 55th AIAA Aerospace Sciences Meeting |
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Country/Territory | United States |
City | Grapevine |
Period | 01/9/17 → 01/13/17 |
Funding
The authors thank the insightful discussions with Daisuke Oshiyama and Phillip Munday. The majority of the computation for this project was performed at the Research Computing Center at the Florida State University. MGM and KT were partially supported by the National Science Foundation (Award Number 1632003).