TY - JOUR
T1 - An extension of the Generalized Actuator Disc Theory for aerodynamic analysis of the diffuser-augmented wind turbines
AU - Liu, Yingyi
AU - Yoshida, Shigeo
N1 - Funding Information:
All the authors gratefully appreciate the valuable discussions with Prof. Jamieson in the past research. The first author gratefully acknowledges the financial support provided by the MEXT Scholarship (Grant No. 123471) from Japanese Government during the three-year PhD research.
Publisher Copyright:
© 2015 Elsevier Ltd
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2015/12/15
Y1 - 2015/12/15
N2 - The one-dimensional momentum theory is essential for understating the physical mechanism behind the phenomena of the DAWT (Diffuser-Augmented Wind Turbines). The present work tries to extend the existing GADT (Generalized Actuator Disc Theory) that proposed by Jamieson (2008). Firstly, the GADT is modified to include an effective diffuser efficiency, which is affected by the thrust loading or axial induction. Secondly, Glauert corrections to the DAWT system in the turbulent wake state are proposed, modelled by a linear and a quadratic approximation, respectively. Finally, for prediction of the axial velocity profile at rotor plane bearing various thrust loadings, an empirical model is established, which can be further used to predict the diffuser axial induction. In addition, the ‘cut-off point’ in Glauert correction and the ‘critical thrust loading’ in axial velocity profile prediction are newly defined to assist the analysis. All the above formulations have been compared and validated with Jamieson's results and Hansen's CFD data, justifying the effectiveness of the present model.
AB - The one-dimensional momentum theory is essential for understating the physical mechanism behind the phenomena of the DAWT (Diffuser-Augmented Wind Turbines). The present work tries to extend the existing GADT (Generalized Actuator Disc Theory) that proposed by Jamieson (2008). Firstly, the GADT is modified to include an effective diffuser efficiency, which is affected by the thrust loading or axial induction. Secondly, Glauert corrections to the DAWT system in the turbulent wake state are proposed, modelled by a linear and a quadratic approximation, respectively. Finally, for prediction of the axial velocity profile at rotor plane bearing various thrust loadings, an empirical model is established, which can be further used to predict the diffuser axial induction. In addition, the ‘cut-off point’ in Glauert correction and the ‘critical thrust loading’ in axial velocity profile prediction are newly defined to assist the analysis. All the above formulations have been compared and validated with Jamieson's results and Hansen's CFD data, justifying the effectiveness of the present model.
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U2 - 10.1016/j.energy.2015.09.114
DO - 10.1016/j.energy.2015.09.114
M3 - Article
AN - SCOPUS:84975874001
VL - 93
SP - 1852
EP - 1859
JO - Energy
JF - Energy
SN - 0360-5442
ER -