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Numerical Study of Aeroacoustics for Centrifugal Fan |
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| รหัสดีโอไอ | |
| Creator | 1. J. Sriwattanamakin 2. K. Tontiwattanakul 3. C. Chumchan 4. N. Moonpa |
| Title | Numerical Study of Aeroacoustics for Centrifugal Fan |
| Publisher | Thai Society of Mechanical Engineers (TSME) |
| Publication Year | 2566 |
| Journal Title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| Journal Vol. | 11 |
| Journal No. | 1 |
| Page no. | JRAME-23-11-004 (p.1-9) |
| Keyword | Aerodynamic noise, Unsteady Reynold Averaged Navier-Stokes, Large Eddy Simulation, Ffowcs Williams and Hawkings |
| URL Website | https://ph01.tci-thaijo.org/index.php/jrame/index |
| Website title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| ISSN | 2229-2152 |
| Abstract | Aerodynamic noise is one of the considerable factors in centrifugal fan design. Due to the fact that there are number of parameters involved with a description of a fan's geometry as well as a complex characteristic of airflow, thus bring many difficulties to the study of noise generating mechanism of a centrifugal fan. In this study, the characteristic of fan noise and the outstanding noise source are investigated using an unsteady state flow simulation with an aeroacoustics modelling. Unsteady Reynolds Averaged NavierStokes (URANS) and Large Eddy Simulation (LES) are used to predict the derivative of pressure w.r.t. time. Afterward, the acoustic model based on Ffowcs Williams and Hawkings (FW-H) acoustic analogy is applied to calculate monopole and dipole noise sources. Prediction results of aerodynamic noise are compared to an experiment. The results indicate that the surfaces of the blade tips are the dominant tonal noise source, whereas the impeller and volute tongue surfaces are the prominent broadband noise source. Moreover, the characteristic of broadband noise is well predicted by the use of LES coupled with the acoustic model. |
