Numerical study of synthetic jet actuator effects in boundary layers

AUTOR(ES)

Mello, Hilton C. de M., Catalano, Fernando M., Souza, Leandro F. de

FONTE

Journal of the Brazilian Society of Mechanical Sciences and Engineering

DATA DE PUBLICAÇÃO

2007-03

RESUMO

This work has as a fundamental objective the numerical study of the effects of synthetic jet actuators on the flow of the boundary layer developed on a flat plate and on a hypothetical airfoil. The aim is to obtain computational data to indicate how these effects may be used as a means of flow control, describing the dynamics of the synthetic jet in the presence of external flow. The present paper uses a spatial Direct Numerical Simulation (DNS) to solve the incompressible Navier-Stokes equations, written in vorticity-velocity formulation. The spatial derivatives are discretized with a sixth order compact finite difference scheme. The Poisson equation for the normal velocity component is solved by an iterative Line Successive Over Relaxation Method and uses a multigrid Full Approximation Scheme to accelerate the convergence. The results of simulations with different values of frequency, amplitude and slot length were analyzed through a temporal Fourier analysis. Through this analysis the decision as to which are the better parameters to delay the separation of the boundary layer is examined.

Documentos Relacionados

• Control of the breathing mechanism of a cracked rotor by using electro-magnetic actuator: numerical study
• A CRITERION FOR THE EXISTENCE OF INERTIAL BOUNDARY LAYERS IN OCEANIC CIRCULATION*
• Active vibration control of an arbitrary thick piezolaminated beam with imperfectly integrated sensor and actuator layers
• Absorbing boundary conditions for numerical simulation of waves
• Study of the effects of a numerically simulated synthetic jet on the delay of separation of the boundary layer on a hipothetical airfoil