| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
For the purpose of quantitative prediction of the aerodynamic sound, the direct numerical simulation of flow field and acoustic field has been conducted using the lattice Boltzmann method. The validation of the simulation with the lattice Boltzmann method was conducted on a two-dimensional airfoil, for which there are plenty of experimental data on aerodynamic sound as well as flow field, and the broadband noise generated from the airfoil, which includes the turbulent sound with high frequency, was successfully predicted with a high degree of accuracy. The simulation was also conducted for low-speed half-ducted propeller fan, and it succeeded in identifying the flow phenomenon for the sound source of the aerodynamic noise.
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