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    題名: Optimization Approach on Flapping Aerodynamic Characteristics of Corrugated Airfoil
    作者: Sun, W.-H;Miao, J-.M;Tai, C.-H;Hung, C.-C.
    關鍵詞: MAVs;aerodynamic,;ANOVA analysis;vorticity
    日期: 2011/02/22
    上傳時間: 2018-09-13 12:11:11 (UTC+8)
    摘要: The development of biomimetic micro-aerial-vehicles
    (MAVs) with flapping wings is the future trend in military/domestic
    field. The successful flight of MAVs is strongly related to the
    understanding of unsteady aerodynamic performance of low Reynolds
    number airfoils under dynamic flapping motion. This study explored
    the effects of flapping frequency, stroke amplitude, and the inclined
    angle of stroke plane on lift force and thrust force of a bio-inspiration
    corrugated airfoil with 33 full factorial design of experiment and
    ANOVA analysis. Unsteady vorticity flows over a corrugated thin
    airfoil executing flapping motion are computed with time-dependent
    two-dimensional laminar incompressible Reynolds-averaged
    Navier-Stokes equations with the conformal hybrid mesh. The tested
    freestream Reynolds number based on the chord length of airfoil as
    characteristic length is fixed of 103. The dynamic mesh technique is
    applied to model the flapping motion of a corrugated airfoil. Instant
    vorticity contours over a complete flapping cycle clearly reveals the
    flow mechanisms for lift force generation are dynamic stall, rotational
    circulation, and wake capture. The thrust force is produced as the
    leading edge vortex shedding from the trailing edge of airfoil to form a
    reverse von Karman vortex. Results also indicated that the inclined
    angle is the most significant factor on both the lift force and thrust
    force. There are strong interactions between tested factors which mean
    an optimization study on parameters should be conducted in further
    runs.
    關聯: MY74000
    顯示於類別:[航空太空工程學系暨研究所] 會議論文

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