TY - JOUR
T1 - Experimental study of the effects of turbine solidity, blade profile, pitch angle, surface roughness, and aspect ratio on the H-Darrieus wind turbine self-starting and overall performance
AU - Du, Longhuan
AU - Ingram, Grant
AU - Dominy, Robert
PY - 2019/12/1
Y1 - 2019/12/1
N2 - New and comprehensive time-accurate, experimental data from an H-Darrieus wind turbine are presented to further develop our understanding of the performance of these turbines with a particular focus on self-starting. The impact of turbine solidity, blade profile, surface roughness, pitch angle, and aspect ratio on the turbine's performance is investigated, parameters that are thought to be critical for small-scale VAWT operation, particularly when operating in the built environment. It is demonstrated clearly that high turbine solidity (Formula presented.) is beneficial for turbine self-starting and that the selection of a thick, symmetrical aerofoil set at a low, negative pitch angle ((Formula presented.)) is better than a cambered foil. Increased blade surface roughness is also shown to improve a turbine's self-starting capability at low tip speed ratios and with high turbine solidity and the associated flow physics are discussed. Finally, it was confirmed that blade span has a significant impact on turbine starting. This paper contributes to the understanding of the turbine characteristics during the starting period and provides clear guidance and validation cases for future design and research in order to promote and justify the wider application of this wind turbine configuration.
AB - New and comprehensive time-accurate, experimental data from an H-Darrieus wind turbine are presented to further develop our understanding of the performance of these turbines with a particular focus on self-starting. The impact of turbine solidity, blade profile, surface roughness, pitch angle, and aspect ratio on the turbine's performance is investigated, parameters that are thought to be critical for small-scale VAWT operation, particularly when operating in the built environment. It is demonstrated clearly that high turbine solidity (Formula presented.) is beneficial for turbine self-starting and that the selection of a thick, symmetrical aerofoil set at a low, negative pitch angle ((Formula presented.)) is better than a cambered foil. Increased blade surface roughness is also shown to improve a turbine's self-starting capability at low tip speed ratios and with high turbine solidity and the associated flow physics are discussed. Finally, it was confirmed that blade span has a significant impact on turbine starting. This paper contributes to the understanding of the turbine characteristics during the starting period and provides clear guidance and validation cases for future design and research in order to promote and justify the wider application of this wind turbine configuration.
KW - design parameters
KW - H-Darrieus
KW - self-starting
KW - turbine performance
KW - vertical axis wind turbine
UR - http://www.scopus.com/inward/record.url?scp=85070748349&partnerID=8YFLogxK
U2 - 10.1002/ese3.430
DO - 10.1002/ese3.430
M3 - Article
AN - SCOPUS:85070748349
VL - 7
SP - 2421
EP - 2436
JO - Energy Science and Engineering
JF - Energy Science and Engineering
SN - 2050-0505
IS - 6
ER -