Turbulent boundary layer wall pressure in Hybrid Recursive Regularized Lattice Boltzmann using the Synthetic Eddy Method

  • Rossi, Thibaut (Thales DMS/M2P2)
  • Jacob, Jérôme (M2P2)
  • Sagaut, Pierre (M2P2)

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Flow-induced noise originates from fluid-solid interaction and results in radiated noise and vibration. In the case of a turbulent boundary layer (TBL) over a rigid solid, wall-pressure fluctuations (WPF) leads to structural vibration which is significant source of noise for underwater acoustic antennas. In the low-Mach limit, it can be demonstrated that pressure fluctuations are kinematically linked to the velocity fluctuations through a Poisson equation. Although DNS or LES can be performed to estimate pressure fluctuations, these computations are not affordable in an industrial context. However, the Lattice Boltzmann Method (LBM) allows to perform LES at a lower computational cost than Navier-Stokes solvers because of it stream-collide algorithm and the use of a hierarchical uniform embedded meshes. Since we are interested in spatially developing turbulence simulations, accurate inflow turbulence prescription is required. To authors’ knowledge, no studies was conducted on the influence of turbulent inflows conditions on the TBL wall-pressure fluctuations. Therefore, it is investigated using a Hybrid Recursive Regularized Lattice Boltzmann Method with inlet turbulence reconstruction