The paper presents the results of constructing physical and mathematical model high-frequency electromagnetic waves propagation in slowly moving media finite dimensions, which takes into account phenomena specular reflection these waves. constructed is based on formulas designed to determine speed as well equations describe advantageous feature that they take Fresnel drag coefficient for speed....

The accurate prediction of helicopter rotor aerodynamics and aeroacoustics using Computational Fluid Dynamics (CFD) techniques still remains a challenge, as the over-dissipation numerical schemes results in higher diffusive rate wake vortices than what can be expected from fluid governing equations. To alleviate this issue, vortex feature-based vorticity confinement (FVC2-L2) method that combin...

A Fourier pseudospectral time-domain method is applied to wave propagation problems pertinent to computational aeroacoustics. The original algorithm of the Fourier pseudospectral timedomain method works for periodical problems without the interaction with physical boundaries. In this paper we develop a slip wall boundary condition, combined with buffer zone technique to solve some non-periodica...

A new multidomain/multiphysics computational framework for optimal control of aeroacoustic noise has been developed based on a near-field compressible Navier–Stokes solver coupled with a far-field linearized Euler solver both based on a discontinuous Galerkin formulation. In this approach, the coupling of near-and far-field domains is achieved by weakly enforcing continuity of normal fluxes acr...