Unexpected Properties of the Propagations Generated by Some Time Harmonic Perturbations in a 2D Infinitely Long Straight Duct Satisfying Different Types of Boundary Conditions

Autor:	Agneta M. BALINT, Stefan BALINT
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	aero acoustics aircraft noise attenuation rectangular 2D lined duct uniform gas flow Motor vehicles. Aeronautics. Astronautics TL1-4050
Zdroj:	INCAS Bulletin, Vol 9, Iss 2, Pp 17-30 (2017)
Druh dokumentu:	article
ISSN:	2066-8201 2247-4528
DOI:	10.13111/2066-8201.2017.9.2.2
Popis:	In this paper the propagation, generated by some explicit permanent time harmonic perturbations are presented, in a 2D straight duct, carrying a constant gas flow. The amplitude of the perturbations is not that given by the Dirac function, as it is considered in general in literature. The boundary conditions imposed to propagations at the walls of the duct are those considered in the literature: sound-soft, sound-hard and mass-spring-dumper. Unexpected properties of the resulting propagations are revealed.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/3bdf920d64494883ad4e7ffeb7892d7a Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF