Simulating Pitching Blade With Free Vortex Model Coupled With Dynamic Stall Model For Conditions Of Straight Bladed Vertical Axis Turbines
2014 (English)In: 33Rd International Conference On Ocean, Offshore And Arctic Engineering, 2014, Vol 9A: Ocean Renewable Energy, AMER SOC MECHANICAL ENGINEERS , 2014Conference paper (Refereed)Text
This study is on the straight bladed vertical axis turbines, which can be utilized for both wind and marine current energy. Vertical axis turbines have the potential of lower installation and maintenance cost. However complex unsteady fluid mechanics of these turbines imposes significant challenges to the simulation tools. Dynamic stall is one of the phenomena associated with the unsteady conditions, and it is in the focus of the study. The dynamic stall effects are very important for vertical axis turbines, since they are usually passively controlled through the dynamic stall. A free vortex model is used to calculated unsteady attached flow, while the separatedflow is handled by the dynamic stall model. This is compared to the model based solely on the Leishman-Beddoes algorithm. The results are assessed against the measured data on pitching airfoils. A comparison of force coefficients between the simulations and experiments is done at the conditions similar to the conditions of H-rotor type vertical axis turbines.
Place, publisher, year, edition, pages
AMER SOC MECHANICAL ENGINEERS , 2014.
IdentifiersURN: urn:nbn:se:uu:diva-272115ISI: 000363499000020ISBN: 978-0-7918-4553-0OAI: oai:DiVA.org:uu-272115DiVA: diva2:893089
33rd ASME International Conference on Ocean, Offshore and Arctic Engineering