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Hybrid RANS-LES Simulation of Turbulent High-Lift Flow in Relation to Noise Generation

Bastian Nebenführ (Institutionen för tillämpad mekanik, Strömningslära) ; Shia-Hui Peng (Institutionen för tillämpad mekanik, Strömningslära) ; Lars Davidson (Institutionen för tillämpad mekanik, Strömningslära)
Progress in Hybrid RANS-LES Modelling, NNFM Vol. 117 (2012),
[Konferensbidrag, refereegranskat]

Turbulence-resolving simulations have been performed using hybrid RANS-LES approaches for the turbulent flow around a three-element high-lift configuration. The main purpose is to explore the effect of some modeling-related numerical aspects on the simulation of resolved velocity and pressure fluctuations as potent noise-generating sources. Along with a presentation of resolved instantaneous and mean flow features, the impact of the time step and the spanwise extent of the computational domain is investigated. It is shown that the temporal resolution and the spanwise extension of the computational domain impose effects not only on the prediction of mean flow, but more significantly on the correlation of resolved turbulent structures, which may consequently affect the accuracy of flow-generated noise properties.

Denna post skapades 2012-08-08. Senast ändrad 2012-08-08.
CPL Pubid: 161251