On the aeroacoustic characterization of a robust trailing-edge serration

This paper presents an experimental study on the aeroacoustics of a flat plate rig with highly instrumented serrated trailing-edge. The role near-field flow properties, namely, surface pressure fluctuations and spanwise coherence, in noise suppression capability serration is not properly understood. results from this test aim to provide additional insight into effects hydrodynamic field (flow field) scattering waves along Despite its unconventional size, beamforming showed significant reduction far-field over broadband frequency range. associated characterized by mean spectral analyses static dynamic measurements as well hot-wire measurements. coefficient boundary layer velocity profiles trailing-edge minute differences compared baseline straight However, frequency-dependent energy content unsteady demonstrates elevated region around edges at low frequencies. Although there increase trailing-edge, phase difference observed, which may be indicative destructive interference. temporal studies regarding corroborate presence quasi-periodic large scale structures emanating edges.