Laser velocimetry for wind tunnel acoustic source localization

Today, the economic and demographic expansion of large cities leads to an increase in air traffic and associated noise pollution, especially in the vicinity of airports. However, as ecology and the notion of sustainable development are increasingly important in political decisions, regulations (taxes…) concerning the environmental impact of this traffic are becoming more stringent. The reduction of noise emitted by aircraft is therefore becoming a major challenge for aircraft manufacturers. Nevertheless, the sources of aerodynamic noise, so-called aeroacoustics, produced by aircraft are multiple and complex. A better knowledge of these sources is therefore essential to be able to develop an effective strategy for reducing the noise generated. The characterization of aeroacoustic sources in the preliminary design phase on models in wind tunnel is therefore a major issue for aeronautics.(…)

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