Determining the Spatial Coherence of Turbulence at MHK Sites

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dc.contributorMarine Energy Technology Symposiumen
dc.contributor.authorKilcher, Levi F.en
dc.contributor.authorThomson, Jimen
dc.contributor.authorColby, Jonathanen
dc.date.accessioned2014-06-30T19:35:30Zen
dc.date.available2014-06-30T19:35:30Zen
dc.date.issued2014-04en
dc.description.abstractAlthough turbulence is thought to be a key variable in the performance and survivability of Marine Hydrokinetic turbines, it has not been fully characterized at sites where they will be deployed. In particular, the conventional metrics of turbulence intensity and turbulent kinetic energy spectra only describe the turbulence at a point. Spatial information is required to estimate the loading across a rotor, for example, and to understand the short-term evolution of turbulence in the vicinity of a device (for potential use in feed-forward control algorithms). Here, we describe a method to collect and analyze data for determining the spatial coherence of turbulence at marine hydrokinetic turbine deployment sites. The approach uses multiple compliant moorings equipped with acoustic Doppler velocimeters and inertial motion units. Analysis of data from previous deployments of a single mooring is used to demonstrate the method, and future deployments are discussed. It is expected that coherence will be highly dependent on scale, with high coherence for large-scale eddies, and low coherence for the smaller, inertial-scale eddies.en
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/49237en
dc.language.isoen_USen
dc.rightsIn Copyrighten
dc.rights.holderKilcher, Levi F.en
dc.rights.holderThomson, Jimen
dc.rights.holderColby, Jonathanen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectTurbulenceen
dc.subjectMarine hydrokinetic poweren
dc.subjectSurvivabilityen
dc.subjectDoppler velocimetersen
dc.titleDetermining the Spatial Coherence of Turbulence at MHK Sitesen
dc.typeConference proceedingen
dc.type.dcmitypeTexten

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