Transonic buffet instability: From two-dimensional airfoils to three-dimensional swept wings

Numerical Simulation of Transonic Buffet on Swept Wing of Supercritical Airfoils

This paper presents transonic buffet simulations over a swept wing of supercritical airfoils with Unsteady Reynolds-Averaged Navier-Stokes (URANS) and Detached-Eddy Simulation (DES) methods. The NASA SC(2)-0714 airfoil is used as wing profile. Computations are conducted at free-stream Mach numbers from 0.72 to 0.84 for Reynolds number 45.0 × 10 based on aerodynamic chord length. Firstly, 2D NAS...

Iterative Solution of Transonic Flows over Airfoils and Wings,

Transonic aerodynamics is the focus of strong interest at the present time because it is known to encompass one of the most efficient regimes of flight. While current transport aircraft operate just below the speed of sound, more radical aerodynamic designs, such as R. T. Jones’ proposal for a yawed wing in [1], favor operation at low supersonic speeds in the range from Mach 1 to 1.3 (a regime ...

Control of vortex shedding on two- and three-dimensional airfoils

We review and expand on the control of separated flows over flat plates and airfoils at low Reynolds numbers associated with micro air vehicles. Experimental observations of the steady-state and transient lift response to actuation, and its dependence on the actuator, airfoil geometry, and flow conditions are discussed and an attempt is made to unify them in terms of their excitation of periodi...

Two-dimensional Shock Sensitivity Analysis for Transonic Airfoils with Leading-Edge and Trailing-Edge Device Deflections

Three Dimensional Symmetry from Two Dimensional Data

In previous applications, bilateral symmetry of objects was used either as a descriptive feature in domains such as recognition and grasping, or as a way to reduce the complexity of structure from motion. In this paper we propose a novel application, using the symmetry property to \symmetrize" data before and after reconstruction. We rst show how to compute the closest symmetric 2D and 3D conng...