| Autor: |
Frieder Lörcher, Sandra Hub, Marlène Sanjosé, Stéphane Moreau |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
International Journal of Turbomachinery, Propulsion and Power, Vol 7, Iss 4, p 37 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2504-186X |
| DOI: |
10.3390/ijtpp7040037 |
| Popis: |
For a backward curved centrifugal fan, reducing volume flow rate from design operating point towards part load yields an increase in noise emission together with a reduction of efficiency. The spectral content of the emerging noise emission can be characterized by a subharmonic hump with several harmonics. Based on narrow-band acoustic measurements and numerical Lattice-Boltzmann simulations, a deeper insight is sought after. Downstream unsteady flow patterns are identified to play a central role in this performance deterioration; and geometrical flow stabilization means are investigated. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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