The effect of viscoelastic noise damping coating over the leading edge slat is discussed in the current study. Evidences from numerical and experimental studies are provided to highlight and/or identify controlling factor/s used to analyse the noise damping mechanism by visco-elastic material. In the previous study (linked to the current), pressure fluctuations over the wing-slat model were measured in a low-speed wind tunnel. The unsteady slat’s surface measurements were made with and without the viscoelastic coating. The measured unsteady data were incorporated into acoustic analogy for calculating spectral quantities and far field noise. Through spectral analysis the effect of the coating was examined and shown that the levels of unsteady fluctuations over the slat surface were damped by almost 600 Pa in the case of coating, corresponding to almost 3 dB reduction in slat’s far-field noise radiation.
|Published - 2014
|Greener Aviation 2014: Clean Sky breakthroughs and worldwide status - The SQUARE, Brussels Meeting Centre, Brussels, Belgium
Duration: 12 Mar 2014 → 14 Mar 2014
|Greener Aviation 2014
|12/03/14 → 14/03/14