Modeling aeroacoustic excitations by subsonic wave packets in the Kirchhoff formalism
TypeCommunications avec actes
The present work aims at linking the shape of a wave packet to its acoustic e ciency through numerical integration of the homogeneous Helmholtz equation in the Kirchho formalism. We shall consider the case of a bidimensional, rectangular domain where one side is a ected by a spatially evolving wave packet as a boundary condition with subsonic convection velocity. In the rst place, the numerical tool is validated by comparison with analytical developments available in literature. Then, an extension to more advanced forms of wave packet is approached. The appearance of a criterion for acoustic e ciency is discussed, as well as the need for a proper de nition regarding the acoustic energy of a wave packet and its radiated energy output.
Files in this item
Showing items related by title, author, creator and subject.
ZAARAOUI, Abdelkader; RAVELET, Florent; MARGNAT, Florent; KHELLADI, Sofiane (Elsevier, 2013)A prototype device for measuring the volumetric flow-rate by counting vortices has been designed and realized. It consists of a square-section pipe in which are placed a two-dimensional bluff body and a strain gauge force ...
ALLAIS, Romain; REYES, Tatiana; ROUCOULES, Lionel (2012)Les travaux présentés ici sont centrés sur l’entreprise et proposent une méthode d’intégration du territoire et de ses parties prenantes dans les processus internes de l’entreprise. L’intégration de ces ressources latentes ...
PIQUARD, Romain; D'ACUNTO, Alain; DUDZINSKI, Daniel (Czech Machine Tool Society, 2014)Micro-milling can be defined as milling with end mills smaller than 1 mm of diameter. The top-down approach from milling to micro-milling is often used to define cutting conditions. Unfortunately geometries either for the ...
PINQUIÉ, Romain; RIVEST, Louis; SEGONDS, Frédéric; VERON, Philippe (Inderscience, 2015)Product lifecycle management (PLM) is a strategic product-centric, lifecycle-oriented and information-driven business approach that strives to integrate people and their inherent practices, processes, and technologies, ...
KUBLER, Régis; GUIHEUX, Romain (2017)The microstructure and mechanical fields were studied on a cold-rolled TRIP 780 steel after conventional shot peening, and with or without pre-strain; for the first time, results were compared to numerical simulations at ...