| 摘要 |
PROBLEM TO BE SOLVED: To provide an aerodynamic sound source probe system and an aerodynamic sound source probe method for analyzing the sound source distribution of an aerodynamic sound on the basis of the theory of fluid noise. SOLUTION: The aerodynamic sound source probe system determines the sound source distribution of an aerodynamic sound generating around an object placed in a flow field. The system comprises a flow rate distribution calculation step which calculates the distribution of a velocity vector u of a flow in the flow field, a vorticity vector calculation step which calculates the distribution of a vorticity vectorωfrom the velocity vector u, and a sound source calculation step which calculates the sound source distribution by substituting the velocity vector u and the vorticity vectorωinto a calculation formula in the frequency domain. COPYRIGHT: (C)2006,JPO&NCIPI
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