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Abstract Far-field noise and flow field over a novel curved trailing-edge serration (named as iron - shaped serration) are investigated. Spectra of the far-field broadband noise, directivity plots and the… Click to show full abstract
Abstract Far-field noise and flow field over a novel curved trailing-edge serration (named as iron - shaped serration) are investigated. Spectra of the far-field broadband noise, directivity plots and the flow-field over the iron-shaped serration are obtained from numerical computations performed using a compressible Lattice-Boltzmann solver. The new design is compared to a conventional trailing-edge serration with a triangular geometry. Both serration geometries were retrofitted to a NACA 0018 airfoil at zero degree angle of attack. The iron-shaped geometry is found to reduce far-field broadband noise of approximately 2 dB more than the conventional sawtooth serration for chord-based Strouhal numbers St c
Journal Title: Journal of Sound and Vibration
Year Published: 2017
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