非定常CFD解析を用いた航空機脚騒音低減デバイスの開発

抄録

This paper describes development of noise reduction devices for aircraft landing gear. The design process of noise reduction devices is based on unsteady CFD analysis. Unsteady CFD analysis is done by in-house CFD code, which utilize unstructured Cartesian grid system and higher order accuracy numerical scheme. Maintenance acceptance was taken into account in selection of devices. The developed devices were tested in low noise wind tunnel. The test results successfully showed 3dBA (over all) noise reduction.