A well posed acoustic analogy based on a moving acoustic medium

Details A well posed acoustic analogy based on a moving acoustic medium A well posed acoustic analogy based on a moving acoustic medium

2010-09-20

arxiv.org/abs/1009.3766v1

Physics

Fluid Dynamics

14 pages, 2 figures Presented at the Aeroacoustic workshop SWING, Dresden 1999

Scientific paper

For flows of a lossless gas, the stagnation enthalpy obeys a linear convected wave equation with coefficients which depend on the flow variables. This equation is self-adjoint and one has a reciprocity relation between source and observer. It fulfills for subsonic flow a quadratic conservation equation implying stability. It is taken as basis for an acoustic analogy and is applied to the sound generation by the collision of a convected vortex and a rigid cylinder.

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