δείτε την πρωτότυπη σελίδα τεκμηρίου στον ιστότοπο του αποθετηρίου του φορέα για περισσότερες πληροφορίες και για να δείτε όλα τα ψηφιακά αρχεία του τεκμηρίου*
AERODYNAMIC ANALYSIS OF HELICOPTER IN INTERACTION WITH WIND TURBINE’S WAKE
(EN)
Papadakis, George
Riziotis, Vasilis
Andronikos, Theologos
ntua
(EL)
Over the last 20 years wind energy has undergone a significant growth. The installation of new wind farms is
increasing globally with an average rate (over the last five years) of 10 percent every year. Current commercial
wind turbines (WTs) have diameters that range between 90 to 150 meters and their total height exceeds 200
meters. Manufacturer’s ambition points towards even bigger turbines with rotor diameters that within the next
decade will reach sizes of about 250m. The above development will consequently lead to larger areas occupied
by future wind farms. On the other hand, helicopters often execute low altitude flights following trajectories that
cross wind farm areas. Furthermore, helicopters are commonly used as transport mean for maintenance staff
transportation missions to distant offshore wind farms (as for example in the North Sea where many wind farms
have been deployed over the last years). It is therefore foreseen that in the coming years the possibility for a
helicopter to fly in interaction with a wind turbine wake will increase. Lack of previous experience or evidence
renders safety checks necessary. In this respect of particular significance is to know whether safe passage
through or in strong interaction with the wake of an operating wind turbine is possible or in such occasion the
turbine should be shutdown. In the present paper, the aerodynamic interaction of a helicopter main rotor with
a wind turbine wake is analyzed on the basis of free wake vortex analysis. Helicopter forward flight crossings
of wind turbine wakes are simulated using different wake flow models.
(EN)
*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.
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