Numerical Study on the Aerodynamics and Wall Effect for a Quadrotor

• Main Authors: Tsai, Shuo-Yu, 蔡燿宇
• Other Authors: Tai, Chang-Hsien
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/88jp5k

碩士 === 國立屏東科技大學 === 車輛工程系所 === 105 === The current multi-axis rotorcraft is simple and small in size, and with excellent flight characteristics, so that in the air shot, air exploration, telemetry, and UAV competitions have a very good performance. In the multi-rotor, the quadrotor because of the low price in popular. In the design, the quadrotor through the lightweight to achieve high endurance, but the instability is not easy to deal with. For this reason, the quadrotor’s aerodynamic characteristics and wall effect-based study are the main purpose for this study. In this study, the Computational Fluid Dynamics (CFD) method was applied to simulate the dynamic flow field of a quadrotot aircraft. The finite volume method was used to solve with Navier-Stokes equations. The interaction between the rotational flow field and the effect of the inflow on it were studied. And to study the thrust effect by influence of spiral spacing. The results show that the thrust is effected by the spiral spacing. The rotors speed is changed and the lift is reduced while the upstream flow through rotors is changed. The thrust of the rotors are clearly slow down while the quadrotor fly into the channel. Moreover, it will cause crash accident if the operation is not carefully.