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Investigation of Unsteady Aerodynamic Characteristics of a Seagull Wing in Level Flight

Journal of Bionic Engineering 2009年第4期6卷 408-414页

作者： Cheolheui Han Department of Aeronautical & Mechanical Design Engineering Chungju National University72 Daehak-roChungju380-702Korea

Unsteady aerodynamic characteristics of a seagull wing in level flight are investigated using a boundary element method.A new no-penetration boundary condition is imposed on the surface of the wing by considering its *** geometry and kinematics of the seagull wing are reproduced using the functions and data in the previously published *** proposed method is validated by comparing the computed results with the published data in the *** unsteady aerodynamics characteristics of the seagull wing are investigated by changing flapping frequency and advance *** is found that the peak values of aerodynamic coefficients increase with the flapping *** thrust and drag generations are complicated functions of frequency and wing stroke *** lift is inversely proportional to the advance *** effects of several flapping modes on the lift and induced drag(or thrust)generation are also *** three single modes(flapping, folding and lead & lag),flapping generates the largest lift and can produce thrust *** three combined modes,both flapping/folding and flapping/lead & lag can produce lift and thrust larger than the flapping-alone mode *** is shown to increase thrust when combined with flapping,whereas lead & lag has an effect of increasing the lift when also combined with *** three modes are combined together,the bird can obtain the largest lift among the investigated *** though the proposed method is limited to the inviscid flow assumption,it is believed that this method can be used to the design of flapping micro aerial vehicle.

关键词： biomimetics aerial locomotion sea gull wing unsteady aerodynamics panel method

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