Hydrokinetic Energy Harnessing by Enhancement of Flow Induced Motion using Passive Turbulence Control.

VIVACE;Vortex Induced Vibrations;Galloping;Ocean Energy Conversion;Passive Turbulence Control;Energy Harnessing;Naval Architecture and Marine Engineering;Engineering;Naval Architecture & Marine Engineering

Chang, Che-ChunTroesch, Armin W. ;

University of Michigan

关键词: VIVACE;    Vortex Induced Vibrations;    Galloping;    Ocean Energy Conversion;    Passive Turbulence Control;    Energy Harnessing;    Naval Architecture and Marine Engineering;    Engineering;    Naval Architecture & Marine Engineering;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/78766/changjim_2.pdf?sequence=2&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Horizontal Marine Hydro-Kinetic (MHK) energy in the form of currents/tides/rivers is worldwide available. The vast majority flows at speeds slower than 3 knots while tur-bines require an average of 5-7knots to be financially viable. The VIVACE Converter (Vortex Induced Vibration for Aquatic Clean Energy) is an innovative energy converter, which is highly scalable and can thus extract energy from even slow flows using the po-tentially disastrous phenomenon of Vortex Induced Vibrations (VIV) or galloping. Due to the self-limiting nature of VIV, the range of synchronization and the amplitude of oscillation restrict the amount of energy generated.The goal of this thesis is to enable VIVACE to attain higher power generation with higher efficiency using high damping required for energy harnessing. Passive Turbulence Control (PTC) utilizing roughness strips is developed and tested experimentally to en-hance Flow Induced Motion (FIM). Experiments are conducted for 4×104