Simulations of wing kinematics on aerodynamic performance using immersed boundary method

• Main Authors: Ku, Yen, 古 硯
• Other Authors: Lin, Chao-An
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/chsqq8

碩士 === 國立清華大學 === 動力機械工程學系 === 106 === The immersed boundary method (IBM) is adopted to explore the flying performance of an insect-like wing with different kinematic profiles. Realistic wing motions based on fruit flies are compared with symmetric rotating motion, which is a simplified motion that mimics the fruit fly motion. Whether the elevating of the fruit-fly wing is beneficial is also considered. Aerodynamic performance is determined according to lift and drag generations. The results show that the realistic fruit-fly motion can generate a stronger lift with a lower drag than symmetric rotating motion. The elevating motion can also prevent the drop of the lift by affecting the instantaneous angle of attack. The results are explained by illustrating the vortex contours, and the mechanisms related to flying performance are also introduced. The purpose of this simulation is to rapidly predict the aerodynamic performance of an insect-like wing since micro air vehicles (MAVs) have gained considerable interests in recent years. Thus, a valid prediction at MAVs’ design stage is important.