Numerical Modeling of Sound Diffraction at a Half-Plane Trailing Edge

Autor:	Mariano Genito, Damiano Casalino
Rok vydání:	2008
Předmět:	Discretization Numerical analysis Mathematical analysis Aerospace Engineering Geometry Euler equations symbols.namesake Discontinuous Galerkin method Vortex sheet symbols Piecewise Potential flow Galerkin method Mathematics
Zdroj:	AIAA Journal. 46:958-966
ISSN:	1533-385X 0001-1452
DOI:	10.2514/1.32047
Popis:	The problem of sound propagation in the presence of a rigid semi-infinite plate and a double-stream sheared mean flow is solved numerically by means of a linearized Lilley’s equation. This is discretized in the frequency-domain by using a Green Function Discretization (GFD) scheme leading to a very ecient numerical method. It is demonstrated that the present approach is able to tackle the edge diraction problem without any additional treatment of the vortex sheet and that it provides results that are in close agreement with the analytical solution for a uniform base flow. In addition it is shown that the results obtained by considering a piecewise constant base flow and a mixing layer base flow compare favourably with the solutions obtained by solving the linearized Euler equations using a discontinuous Galerkin method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a4f3e1e73b0991f92c4023a62d56c1d4 https://doi.org/10.2514/1.32047 Zobrazit plný text záznamu