Investigation on rod-airfoil noise with high-order cell-centered finite difference method and acoustic analogy

Aerodynamic Noise Computation of the Flow Field around NACA 0012 Airfoil Using Large Eddy Simulation and Acoustic Analogy

The current study presents the results of the aerodynamic noise prediction of the flow field around a NACA 0012 airfoil at a chord-based Reynolds number of 100,000 and at 8.4 degree angle of attack. An incompressible Large Eddy Simulation (LES) turbulence model is applied to obtain the instantaneous turbulent flow field. The noise prediction is performed by the Ffowcs Williams and Hawkings (FW-...

Computational Aero-Acoustic Using High-order Finite-Difference Schemes

A Numerical Study of Flow Around an Oscillating Airfoil with High-Order Spectral Difference Method

A high-order spectral difference flow solver for compressible three-dimensional NavierStokes (N-S) equations has been utilized to numerically simulate the unsteady flow over the NACA 0012 airfoil undergoing a sinusoidal pitching motion at the Reynolds (Re) number of 12600. The effects of the reduced frequency and Strouhal number on the wake vortex structure and force coefficient have been studi...

Solution of propagation of acoustic-gravity waves in the atmosphere using finite difference method of order two

Investigating waves propagation’s equation in the atmosphere is one of the important and widely used issues in various sciences, which has attracted many researchers. A type of propagating waves is an acoustic-gravity wave. These type of waves have a lot of stationarity properties and can be propagate to a high altitude in the atmosphere. The equation of acoustic-gravity wave propagation is a h...

A computational study of vortex-airfoil interaction using high-order finite difference methods

Simulations of the interaction between a vortex and a NACA0012 airfoil are performed with a stable, high-order accurate (in space and time), multi-block finite-difference solver for the compressible NavierStokes Equations. We begin by computing a benchmark test case to validate the code. Next, the flow with steady inflow conditions are computed on several different grids. The resolution of the ...