On unidirectional flight of a free flapping wing
نویسندگان
چکیده
We study the dynamics of a rigid, symmetric wing that is flapped vertically in a fluid. The motion of the wing in the horizontal direction is not constrained. Above a critical flapping frequency, forward flight arises as the wing accelerates to a terminal state of constant speed. We describe a number of measurements which supplement our previous work. These include a a study of the initial transition to forward flight near the onset of the instability, b the separate effects of flapping amplitude and frequency, c the effect of wing thickness, d the effect of asymmetry of the wing planform, and e the response of the wing to an added resistance. Our results emphasize the robustness of the mechanisms determining the forward-flight speed as observed in our previous study. © 2006 American Institute of Physics. DOI: 10.1063/1.2148989
منابع مشابه
Loading Estimation of Flapping Wings under Aeroelastic Effect Using Finite Element Method
The aim of this paper is to provide an aeroelastic computational tool which determines the induced wing loads during flapping flight. For this purpose, a Finite Element (FE) code based on a four-node plate bending element formulation is developed to simulate the aeroelastic behavior of flapping wings in low incompressible flow. A quasi-steady aerodynamic model is incorporated into the aeroelast...
متن کاملNumerical Study of Flapping-Wing Flight of Hummingbird Hawkmoth during Hovering: Longitudinal Dynamics
Abstract—In recent decades, flapping wing aerodynamics has attracted great interest. Understanding the physics of biological flyers such as birds and insects can help improve the performance of micro air vehicles. The present research focuses on the aerodynamics of insect-like flapping wing flight with the approach of numerical computation. Insect model of hawkmoth is adopted in the numerical s...
متن کاملFirst free-flight flow visualisation of a flapping-wing robot
Flow visualisations are essential to better understand the unsteady aerodynamics of flapping wing flight. The issues inherent to animal experiments, such as poor controllability and unnatural flapping when tethered, can be avoided by using robotic flyers. Such an approach holds a promise for a more systematic and repeatable methodology for flow visualisation, through a better controlled flight....
متن کاملFlapping wing flight can save aerodynamic power compared to steady flight.
Flapping flight is more maneuverable than steady flight. It is debated whether this advantage is necessarily accompanied by a trade-off in the flight efficiency. Here we ask if any flapping motion exists that is aerodynamically more efficient than the optimal steady motion. We solve the Navier-Stokes equation governing the fluid dynamics around a 2D flapping wing, and determine the minimal aero...
متن کاملFlapping Wing Air Vehicles at Kaist
The flapping wing flight has superior maneuverability and aerodynamic advantages in a low Reynolds number regime. Nature’s flyers generate aerodynamic forces and moments from the various wing motions such as flapping and pitching to fly and sustain its flight stability. Bioinspired design of flapping air vehicle is one of the effective ways to exploit such a complex system. However the flapping...
متن کامل