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Summary: ,
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High-order sonic boom modeling based on adaptive methods
F. Alauzeta, A. Loseillea
a
INRIA, Projet Gamma, Domaine de Voluceau, Rocquencourt, BP 105,
78153 Le Chesnay Cedex, France.
Abstract
This paper presents an accurate approach to simulate the sonic boom of supersonic aircrafts. The near-field
flow is modeled by the conservative Euler equations and is solved using a vertex-centered finite volume
approach on adapted unstructured tetrahedral meshes. A metric-based anisotropic mesh adaptation is
considered to control the interpolation error in Lp norm. Then, from the CFD solution, the pressure
distribution under the aircraft is extracted and used to set up the initial conditions of the propagation
algorithm in the far-field. The pressure distribution is propagated down to the ground in order to obtain the
sonic boom signature using a ray tracing algorithm based upon the Thomas waveform parameter method.
In this study, a sonic boom sensitivity analysis is carried out on several aircraft designs (low-drag and
low-boom shapes).
Key words: Sonic boom, Euler equations, finite volume, anisotropic mesh adaptation, Waveform
Parameter Method.
1. Introduction
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