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http://dx.doi.org/10.5050/KSNVE.2010.20.2.115

Theoretical and Experimental Study on Airfoil Singing  

Ahn, Byoung-Kwon (충남대학교 항공우주선박해양공학부)
Lee, Jong-Hyun (충남대학교 항공우주선박해양공학부)
Rhee, Wook (충남대학교 항공우주선박해양공학부)
Choi, Jong-Soo (충남대학교 항공우주선박해양공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.20, no.2, 2010 , pp. 115-121 More about this Journal
Abstract
Periodic vortex separations generate periodic vertical forces acting on a trailing edge of an airfoil. When a natural frequency of the trailing edge of the airfoil is close to a vortex shedding frequency, an amplitude of the edge oscillation becomes maximal; it makes intensive noise called singing. Motion of the trailing edge may also feedback to the vortex shedding so that self-sustained oscillation appears, and a resonant frequency is locked in some interval of the speed of the incident flow. In this study, a theoretical model is proposed and applied for modeling an airfoil singing. Results are compared with experimental measurements which are carried out in an anechoic wind tunnel.
Keywords
Singing; Vortex; Lock-in Phenomenon; Self-sustained Oscillation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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