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Flapping 운동의 최적공력성능을 위한 익형 연구
A Study of an Airfoil for Optimal Aerodynamic Performance of Flapping Motion

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Authors
이정상; 김종암; 노오현
Issue Date
2003-06
Publisher
한국전산유체공학회
Citation
한국전산유체공학회지, Vol.8 No.2, pp. 24-32
Keywords
공학플래핑운동추력계수추진효율올챙이형 익형Flapping MotionTrust CoefficientPropulsive EfficiencyTadpole like Airfoil
Abstract
In this work, we propose a new idea of flapping airfoil design for optimal aerodynamic performance from detailed computational investigations of flow physics. Generally, flapping motion which is combined with pitching and plunging motion of airfoil, leads to complex flow features such as leading edge separation and vortex street. As it is well known, the mechanism of thrust generation of flapping airfoil is based on inverse Kármán-vortex street. This vortex street induces jet-like flow field at the rear region of trailing edge and then generates thrust. The leading edge separation vortex can also play an important role with its aerodynamic performances. The flapping airfoil introduces an alternative propulsive way instead of the current inefficient propulsive system such as a propeller in the low Reynolds number flow. Thrust coefficient and propulsive efficiency are the two major parameters in the design of flapping airfoil as propulsive system. Through numerous computations, we found the specific physical flow phenomenon which governed the aerodynamic characteristics in flapping airfoil. Based on this physical insight, we could come up with a new kind of airfoil of tadpole-shaped and more
enhanced aerodynamic performance.
ISSN
1598-6071
Language
Korean
URI
http://hdl.handle.net/10371/82519
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
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