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

摘要

A first method comprises researching a start point of a shear layer as a flow field characteristic of a region in the vicinity of an original shape of a designed object (S5), and adding a plate-shaped object in the vicinity of the start point of the shear layer (S7) to change the start point to an edge portion of the plate-shaped object to make the shear layer farther from the original shape added with the plate-shaped object, thereby attenuating aerodynamic noise of the designed object. A second method comprises researching a static pressure and an airflow velocity in a region in the vicinity of an original shape of a designed object as a flow field characteristic of the region in the vicinity of the original shape (S5), and adding a plate-shaped object for covering a surface of the original shape which is different from a surface of the original shape facing an upstream side in an airflow direction (S7) to increase the static pressure in the region in the vicinity of the original shape to reduce the airflow velocity, thereby attenuating aerodynamic noise of the designed object.