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http://dx.doi.org/10.12985/ksaa.2016.24.4.020

A Numerical Study on the Flowfield around a NACA 0021 Airfoil at Angles of Attack  

Kim, Sang-Dug (초당대학교 항공정비학과)
Publication Information
Journal of the Korean Society for Aviation and Aeronautics / v.24, no.4, 2016 , pp. 20-25 More about this Journal
Abstract
A primary benefit of flight at high angle-of-attack conditions is to be able to reduce the speed of flight and maneuvers, which can enhance the capability of sensing and obstacle avoidance for a small UAV. The flight at high angle-of-attack conditions, however, is easy to be beyond stall which is characterized by substantial flow separation over an airfoil. Current numerical analysis was conducted on the capabilities of three representative turbulence models to predict the aerodynamic characteristics of a typical airfoil at angle-of-attack conditions. The investigation shows that these turbulence models provide good comparison with experimental data for attached flow at moderate angle-of-attack conditions. Calculation by current turbulence models are, however, not appropriate at high angle-of-attack conditions with flow separation.
Keywords
Airfoil; Angle-of-attack; Turbulence flow; Separation; Turbulence model;
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Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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