초록 ▼

An initial object shape is set in a first process, a numeric fluid dynamic grid is generated on the surface of the object shape in a second process, and Navier-Stokes equations are numerically solved by numerical fluid dynamics based on the object and the grid generated with the object shape and an

An initial object shape is set in a first process, a numeric fluid dynamic grid is generated on the surface of the object shape in a second process, and Navier-Stokes equations are numerically solved by numerical fluid dynamics based on the object and the grid generated with the object shape and an object surface pressure is determined in a third process. The noise generated by the object is a determined in a fourth process, by solving Curle's formula based on the object surface pressure, and noises are again determined in a fifth process by updating the object shape and repeating the first through fourth processes. By determining an object shape based on a shape which generates the smallest noise from among the noises determined by the fifth process, it becomes possible to determine a shape of the object as a shape capable of minimizing aerodynamic noise generated upon movement of the object through a fluid medium.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of using a processor to receive signals from an input device providing an object shape by performing operations for determining the object shape that minimizes aerodynamic noise generated upon movement of the object through a fluid medium, comprising:a first st

[ What is claimed is:] [1.]1. A method of using a processor to receive signals from an input device providing an object shape by performing operations for determining the object shape that minimizes aerodynamic noise generated upon movement of the object through a fluid medium, comprising:a first step of setting an initial object shape;a second step of generating a numerical fluid dynamic grid on a surface of the object shape;a third step of numerically solving, by numerical fluid dynamics, Navier-Stokes equations based on the grid generated with the object shape and the object, and determining a pressure of the object surface;a fourth step of determining noise generated by said object by solving Curle's formula based on the pressure of the object surface; anda fifth step of updating the object shape while repeating said first through fourth steps and determining the noise thereof,wherein the shape of said object is determined based on a shape which generates the smallest noise from among the noises determined in said fifth step.