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Aerodynamic and Aeroacoustic Numerical Investigation of Turbofan Engines using Lattice Boltzmann Methods

Authors
  • Hainaut, Thomas
  • Le Garrec, Thomas
  • Polacsek, Cyril
  • Mincu, Daniel
  • Deck, Sébastien
Publication Date
Jun 25, 2018
Identifiers
DOI: 10.2514/6.2018-3922
OAI: oai:HAL:hal-02339485v1
Source
HAL-SHS
Keywords
Language
English
License
Unknown
External links

Abstract

In recent years, lattice Boltzmann methods showed promising advantages over standard Navier-Stokes equation-based solvers. In this work, the capacity to predict both self noise and interaction noise is evaluated. First, a rod-airfoil interaction case is investigated, where the turbulence wake of the rod impinges the leading edge of the airfoil. Thereafter, a semi-infinite ducted axial fan is studied, where the turbulent boundary layers on each blades generate self noise which propagates into the duct, and radiates to the far-field. Subsequently, a ducted grid simulation is performed to verify the properties of the grid-generated turbulence. Finally, the grid and the axial-fan are combined within the same configuration, which comprises both self-noise and interaction noise. For each configuration, the agreements with experiments are satisfactory, however, acoustic propagation issues have been encounters from the duct intake to the free field. Nevertheless, the implemented wall model at the solid boundaries seems to correctly predict the acoustic sources on the blades.

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