Abstract
The influence of the wake of an upstream turbine impinging another one located further downstream is studied focusing on the latter’s noise emission. Measurement data are investigated in the form of surface pressure fluctuations acquired using microphones flush-mounted in a wind turbine blade near its tip, characterizing the noise sources. Numerical results from a wind turbine noise model are also included in the analysis. The wind speed deficit and increased turbulence levels of the wake flow are clearly observed. Surface pressure measurements strongly support the fact that turbulent inflow noise is increased. However, numerical results show that the wake velocity deficit reduces noise in certain circumtances. This can compensate, or even sometime more than compensate, the additional noise emission expected as a result of the wake turbulence. Furthermore, noise amplitude modulation appears to increase when the turbine is impacted by the wake flow.
Original language | English |
---|---|
Article number | 022001 |
Book series | Journal of Physics: Conference Series |
Volume | 1037 |
Issue number | 2 |
Number of pages | 10 |
ISSN | 1742-6596 |
DOIs | |
Publication status | Published - 2018 |
Event | The Science of Making Torque from Wind 2018 - Politecnico di Milano (POLIMI), Milan, Italy Duration: 20 Jun 2018 → 22 Jun 2018 Conference number: 7 http://www.torque2018.org/ |
Conference
Conference | The Science of Making Torque from Wind 2018 |
---|---|
Number | 7 |
Location | Politecnico di Milano (POLIMI) |
Country | Italy |
City | Milan |
Period | 20/06/2018 → 22/06/2018 |
Internet address |