Abstract
Recently, it is demanded reduction technique of an airframe noise emanating from a high-lift device at a landing with an engine noise decrease. However, there are several problems in the noise reduction device to put it on an actual machine. In this study, the low noise of the leading edge slat which was one of the major noise sources for the purpose of becoming it performed an aerodynamics design and performance validation. This paper focuses on a simplified high-lift configuration model (OTOMO). Several different geometries are designed as a purpose to reduce a denuded area in causative cove in OTOMO. About two of the Slat cove filler shape that puffed out slat inferior surface and the Thin slat shape that thinned are tested. As for Slat cove filler shape and the Thin slat shape, the aerodynamics performance did not change very much together in comparison with OTOMO. In addition, these devices compared the change of the denuded area of the part which caused the noise from each flow field with OTOMO. There is some difference in size in both shapes, but shows a thing becoming smaller than OTOMO.
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