METHOD OF ATTENUATING NOISE IN AIRCRAFT, LANDING GEAR STRUCTURE OF AIRCRAFT, AND AIRCRAFT

摘要

A first method comprises a step (S5) for investigating the start point of a shear layer as the flow field characteristics around the original shape of an object to be designed, and a step (S7) for giving a planar object to the vicinity of the start point, and is characterized in that the shear layer is kept away from the original shape to which the planar object is given by changing the start point of the shear layer to the edge of the planar object thus reducing aerodynamic noise of the object to be designed. A second method comprises a step (S5) for investigating the static pressure and the air velocity around the original shape as the flow field characteristics around the original shape of an object to be designed, and a step (S7) for giving a planar object covering the surface different from the surface facing the upstream side in the flow direction of air flow in the original shape, and is characterized in that the air velocity is reduced by increasing the static pressure around the original shape thus reducing aerodynamic noise of the object to be designed.