Veuillez choisir le dossier dans lequel vous souhaitez ajouter ce contenu :
Filtrer les résultats
Colloque
Betz used actuator-disc theory to determine the maximum power coefficient of horizontal-axis wind turbines as a function of tip-speed ratio λ. This analysis has recently been formulated for vertical-axis machines and, when compared with experiment, seems to give slightly pessimistic results. The limit for large λ is the same as the conventional Betz value, \( \frac{16}{27} \). A pair of discs in tandem is a more suitable representation of a vertical-axis wind turbine and the limit for this configuration is shown to be \( \frac{16}{25} \). For academic interest the analysis has now been extended to actuator discs giving a …
