• Corpus ID: 53469656

Flat plate self-noise reduction at low-to-moderate Reynolds number with trailing edge serrations

@inproceedings{Moreau2011FlatPS,
  title={Flat plate self-noise reduction at low-to-moderate Reynolds number with trailing edge serrations},
  author={Danielle J. Moreau and Laura A. Brooks and Con J. Doolan},
  year={2011}
}

• D. Moreau, L. Brooks, C. Doolan
• Published 2011
• Physics

This paper explores the noise reduction potential of sawtooth trailing edge serrations on a flat plate at lowto� moderate Reynolds number. The noise radiated by a flat plate with both sharp and serrated trailing edges has been measured in an anechoic wind tunnel at the University of Adelaide. The noise measurements have been taken at a range of flow speeds (Reynolds numbers of Re c < 4.5 × 10 5 , based on chord) for two different sawtooth geometries. Trailing edge serrations are found to achieve an average attenuation of up to 7 dB over a large frequency range. The measured noise reductions show a linear dependence on Strouhal number, St = fδ/U∞, where f is the frequency, δ is the boundary layer thickness and U∞ is the free stream velocity. The results of this study are compared with theoreti� cal noise reduction predictions showing that significant differences exist between measurements and theory.