Numerical illustration of the global and local stability and instability of the constant spatially developing 2D gas flow

Autor:	Agneta M. BALINT, Stefan BALINT
Jazyk:	angličtina
Rok vydání:	2016
Předmět:	global/ local stability/ instability spatially developing gas flow Motor vehicles. Aeronautics. Astronautics TL1-4050
Zdroj:	INCAS Bulletin, Vol 8, Iss 4, Pp 43-58 (2016)
Druh dokumentu:	article
ISSN:	2066-8201 2247-4528
DOI:	10.13111/2066-8201.2016.8.4.4
Popis:	In this paper different types of stabilities (global, local) with respect to instantaneous perturbations and permanent source produced time harmonic perturbations are numerically illustrated in case of a constant spatially developing 2D gas flow. Some types of instabilities (global absolute, local convective) are also illustrated. For this purpose the 2D Euler equations linearized at the constant gas flow are used. It is illustrated for instance, that the constant gas flow is global absolutely unstable with respect to some instantaneous and some permanent source produced time harmonic perturbations. The locally convective instability is also illustrated with respect to some instantaneous and some permanent source produced time harmonic perturbations.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/e348a3129bfc47deb69472ab105f6723 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF