A high-resolution preserving sliding-mesh approach based on meshless methods: application to acoustic propagation in presence of rotor/stator features

Sofiane Khelladi , Xesús Nogueira , Moisés Solis , Farid Bakir (1) , Ignasi Colominas , Jacky Mardjono

1 DynFluid - Laboratoire de Dynamique des Fluides

The acoustic hybrid approach is commonly used in the simulation of turbomachinery flows. In this technique, the aerodynamic field is solved in order to define acoustic sources, and then, these sources are propagated by solving linearised Euler equations (LEE) using a high order finite volume solver based on MLS reconstruction. One of the most widespread numerical techniques used in the numerical simulations of rotor/stator or rotor/rotor interaction flow is the so-called sliding mesh method. This technique allows relative sliding of one grid adjacent to another grid (static or in motion). However, when a high-order method is used, the interpolation used in the sliding mesh model needs to be of, at least, the same order than the numerical scheme, in order to prevent loss of accuracy. In this work we present a sliding mesh model based on the use of Moving Least Squares (MLS) approximants. It is used with a high-order (>2) finite volume method that computes the derivatives of the Taylor reconstruction inside each control volume using MLS approximants. Thus, this new sliding mesh model fits naturally in a high-order finite volume framework for the computation of acoustic wave propagation into turbomachinery.

Mots clés: Aeroacoustics; Turbomachinery; Finite volumes; Source propagation

Domaines: Acoustique [physics.class-ph]

Sofiane Khelladi, Xesús Nogueira, Moisés Solis, Farid Bakir, Ignasi Colominas, et al.. A high-resolution preserving sliding-mesh approach based on meshless methods: application to acoustic propagation in presence of rotor/stator features. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810909⟩