The Analysis of Aerodynamic Performance on the Flapping Wings

• Main Authors: Shao-Fu Wang, 王少甫
• Other Authors: San-Yih Lin
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/91176404150986268419

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 93 === 　　A numerical method is developed to study the flapping wing flowfields. The method uses finite-volume method to solve the Euler equation. A diagonal dominant alternating direction implicit scheme (DDADI) coupling with an implicit residual smoothing is used for the time integration to achieve fast convergence of the proposed scheme. The upwind scheme is a MUSCL-type scheme. 　　For aerodynamic performance on the flapping wings. Body of NACA0018 airfoil and wing of NACA2412 airfoil are chosen for studing. Quantitative understanding the effects of the flapping frequency, mean angle of attack, pitching angle and wing shape are calculated. There is a better propulsion efficiency at reduce frequency of. Reversed trapezoidal wing has a better propulsion efficiency than Rectangular wing and trapezoidal wing.