Volume 5, Juin 2013Progress in Flight Physics
|Page(s)||601 - 620|
|Section||Chapter Nine. Configuration aerodynamics, sonic boom, and aircraft aerodynamic model|
|Published online||14 June 2013|
Impact of multipole matching resolution on supersonic aircraft sonic boom assessment
Applied Aerodynamics Department, Civil Aircraft Unit Office
National d'Etudes et de Recherches Aérospatiales (ONERA)
8 Rue des Vertugadins,
2 Department of Numerical Simulation and Aeroacoustics, ONERA BP 72-29, Av. de la Division Leclerc, Châtillon Cedex 92322, France
Sonic boom assessment methods through numerical analysis have been ever-evolving since the development of the fundamental theory. With the growing need for efficient low-boom design tools and the increasing computational resources, original approaches using advanced numerical simulation techniques have been developed. Among the various existing methods, the three-layer resolution introduced in the 1990s is very convenient for low-boom aircraft design. It is based on near-field computational fluid dynamics (CFD) calculation which is matched with the far-field propagation code using a description of the source with multipoles before undergoing classical acoustic propagation through atmosphere. The present paper reviews the theory of the near- to far-field matching as well as the different resolution approaches and their limits. The impact of the resolution method on the ground propagated signal is also presented.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.