Smart Control of Flow Separation around an Airfoil

Active Control of Flow Separation Over an Airfoil

Designing an aircraft without conventional control surfaces is of interest to aerospace community. In this direction, smart actuator devices such as synthetic jets have been proposed to provide aircraft maneuverability instead of control surfaces. In this article, a numerical study is performed to investigate the effects of unsteady suction and blowing oil airfoils. The unsteady suction and blo...

Instabilities of Stationary Inviscid Compressible Flow around an Airfoil

In this paper we numerically solve the stationary inviscid flow around an airfoil. Using the second-order explicit Runge–Kutta method in combination with the MUSCL scheme and the minmod limiter, we do not obtain a machine accurate solution. This has already been observed in literature and is explained by the non-differentiability of the minmod limiter. An analysis of the limiter shows that it i...

Optimization of a synthetic jet actuator for flow control around an airfoil

This paper deals with the optimization of a synthetic jet actuator parameters in the control flow around the NACA0015 airfoil at two angles of attack: 13° (i.e. the stall angle of NACA0015) and 16° (i.e. the post stall angle of NACA0015) to maximize the aerodynamic performance of the airfoil. Synthetic jet actuator is a zero mass flux-active flow control device that alternately injects and remo...

Optimal Control of Unsteady Stokes Flow around an Airfoil and the Sensor/actuator Placement Problem

The task of choosing good sensor and actuator locations to control a distributed system can result in search spaces which grow combinatorially. We propose to apply an initial effectiveness filter based on distributed LQR optimal control which can be computed at polynomial cost. This thought experiment, applied to the NACA 0015 airfoil in an unsteady Stokes flow regime, shows that a disturbance ...

Study of flow separation over an airfoil with synthetic jet control using large-eddy simulation