Study of Stall Development Around an Airfoil by Means of High Fidelity Large Eddy Simulation

Autor:	Ivan Mary, Eric Lamballais, Nicolas Alferez
Rok vydání:	2013
Předmět:	Airfoil Physics Leading edge Characteristic length General Chemical Engineering Bubble General Physics and Astronomy Reynolds number Stall (fluid mechanics) Laminar flow Mechanics symbols.namesake symbols Physical and Theoretical Chemistry Large eddy simulation
Zdroj:	Flow, Turbulence and Combustion. 91:623-641
ISSN:	1573-1987 1386-6184
DOI:	10.1007/s10494-013-9483-7
Popis:	Large Eddy Simulation of the bubble bursting process over a NACA-0012 airfoil at $Re_{c}=10^{5}$ indicates that the flow at a fixed angle of attack below the critical stall value exhibits a short (with respect to Gaster’s criteria, Gaster, Number CP-4 in AGARD, 1966) Laminar Separation Bubble (LSB) at the leading edge of the airfoil. The airfoil is smoothly pitched-up through the static stall angle to reproduce the bursting process of the short LSB that initiates a leading edge stall typical of low Reynolds number airfoil. The temporal evolution of characteristic length scales is monitored during the transient flow. Particular attention is paid to the characteristic time involved during the growth and bursting of the LSB. A recent empirical bursting criterion is used to analyse the LES results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ea08e4b7a0bc2c7bd20916f939fb8d74 https://doi.org/10.1007/s10494-013-9483-7 Zobrazit plný text záznamu Full text from SpringerLink