Large Eddy Simulation of a Compressor Blade Passage Operating at Low Reynolds Number
This paper presents the preliminary results from the numerical study of an axial compressor operating at low maximum Reynolds number of \(5\times 10^4\), flow coefficient \(\phi = 0.32\) and head coefficient of \(\psi =0.28\). The overall goal is to use high fidelity simulations to accurately calculate the acoustic sources responsible for noise generation in the compressor. However, this is a challenging task and the first step is to gain confidence in the accuracy of the LES with respect to mesh resolution and sub-grid scale modelling. The objective of this study is therefore to assess the effect of mesh resolution and subgrid scale models on the flow field. The main points of interest are to accurately resolve the unsteady wall pressure spectrum at the blade trailing edge, as well as turbulent length scales and intensities in the wake. These results can be used as direct inputs to analytical noise propagation theories to predict the generated noise in the far-field.
- 1.Archambeau, F., Mechitoua, N., Sakiz, M.: Code_Saturne: a finite volume code for the computation of turbulent incompressible flows - industrial applications. Int. J. Finite Vol. 1 (2004)Google Scholar