High-Resolution Large-Eddy Simulation of Flow Around Low-Pressure Turbine Blade

Autor:	Ivan Mary, N. Liamis, B. Raverdy, Pierre Sagaut
Rok vydání:	2003
Předmět:	Physics Turbine blade Turbulence Turbulence modeling Aerospace Engineering Reynolds number Mechanics law.invention Physics::Fluid Dynamics Boundary layer symbols.namesake Flow separation Classical mechanics law symbols Reynolds-averaged Navier–Stokes equations Large eddy simulation
Zdroj:	AIAA Journal. 41:390-397
ISSN:	1533-385X 0001-1452
DOI:	10.2514/2.1989
Popis:	Large-eddy simulation ofcompressible Navier-Stokes equations is used to study flows where a laminar boundary-layer separation is followed by a turbulent reattachment. The aim of the present work is to predict and describe the transition process and its interaction with the wake dynamics for a subsonic blade turbine configuration. Indeed, a better knowledge of this mechanism can help to improve the accuracy of a Reynolds-averaged Navier-Stokes turbulence model for such a flow case. High-resolution large-eddy-simulation-type computations have been carried out for the T106 low-pressure blade turbine at inlet Mach number of 0.1 and chord Reynolds number of 1.6 x 10 5 based on the exit isentropic velocity. The simulated mean and turbulent quantities compare well with the available experimental data. The primary two-dimensional instability that originates from the free shear in the bubble is unstable via the Kelvin-Helmholtz mechanism. Then, the three-dimensional motions spread on the boundary layer, leading to full breakdown to turbulence after the reattachment point
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e21cf1a87d319fe92f15aa7d10a55a7c https://doi.org/10.2514/2.1989 Zobrazit plný text záznamu