Direct Numerical Simulation of the Micro-Fluid Dynamics of Acoustic Liners
Nowadays, acoustic liners are essential for jet engine noise suppression. In the case of resonant liners, the openings of the resonators are usually very small. Because of the small dimensions, the flow field around the mouth of the resonators has not been directly observed or measured experimentally. This is so in spite of the fact that most acoustic energy dissipation takes place in this region. Present day understanding of the flow field and dissipation mechanisms of resonant liners are largely theoretical or is based on experiments using much larger scale models. The Reynolds number of these large models are, however, not the same as those of the actual resonators of the liner.
KeywordsDirect Numerical Simulation Perfectly Match Layer Dissipation Mechanism Slug Flow Resonator Opening
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