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

Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 117)

Abstract

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.

Keywords

Sound Pressure Level Suction Side Large Time Step Main Wing Spanwise Extent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Bastian Nebenführ
    • 1
  • Shia-Hui Peng
    • 1
    • 2
  • Lars Davidson
    • 1
  1. 1.Chalmers University of TechnologyGöteborgSweden
  2. 2.Swedish Defence Research Agency (FOI)StockholmSweden

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