The effectiveness of various fairings for landing gear noise reduction was measured in the Virginia Tech (VT) Stability Wind Tunnel. This wind tunnel was recently upgraded to an aeroacoustic facility, which allowed acoustic measurements to be carried out in the far-field, out of the flow, and in a low reverberant environment. The model was a very faithful replica of the full-scale landing gear, designed to address the issues associated with low-fidelity models. A 63-element microphone phased array was used to locate the noise source components of the landing gear in its baseline and streamlined configurations, and to measure the noise reduction potential of the fairings. Measurements were carried out from two far-field positions on the flyover path of the landing gear. Through a comparison between the noise levels of the landing gear with and without fairing, the noise reduction potential of each fairing could be estimated. The results from these experiments also showed that if phased-array measurements of the landing gear noise are carried out in the near-field, the noise reduction potential of the fairings could be largely overestimated.
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