Acoustic Characterization of a Hydrokinetic Turbine Public Deposited

http://ir.library.oregonstate.edu/concern/technical_reports/ms35t886k

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Abstract— This study describes the sound produced by a hydrokinetic turbine operating in a riverine environment near Iguigig, AK (USA). Drifting spar buoys equipped with hydrophones and GPS loggers were used to characterize temporal and spatial variability in turbine sound over a range of turbine operating conditions. Because of the quasi-stationary nature of river flows, multiple replicates could be obtained under steady-state operation. The sound from this turbine consists primarily of tones (ascribed to the generator) and broadband emissions (ascribed to blade vibration). The frequency of the tones varies in proportion to the turbine rotation rate. At the closest point of approach, for an optimally operating turbine, one-third octave levels are elevated by up to 40 dB relative to braked conditions. Broadband spatial patterns suggest relatively limited sound directivity. This study highlights the benefits of using Lagrangian drifters to characterize turbine sound (e.g., flow noise mitigation, spatially-resolved acoustic fields) and challenges (e.g., positional accuracy, self-noise contamination). Further analysis is required to interpret spatial variability in the context of acoustic propagation in riverine environments.
Resource Type
Date Available
Date Issued
Non-Academic Affiliation
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Belinda Batten(bbatten@engr.oregonstate.edu) on 2016-06-01T21:17:38Z (GMT) No. of bitstreams: 1 Polagye--Acoustic_Characterization_of_a_Hydrokinetic_Turbine--EWTEC2015_Revision.pdf: 453936 bytes, checksum: c19858ce8df604e0c2b8bdf4c7586e8a (MD5)
  • description.provenance : Made available in DSpace on 2016-06-01T21:17:38Z (GMT). No. of bitstreams: 1 Polagye--Acoustic_Characterization_of_a_Hydrokinetic_Turbine--EWTEC2015_Revision.pdf: 453936 bytes, checksum: c19858ce8df604e0c2b8bdf4c7586e8a (MD5) Previous issue date: 2015
  • description.provenance : Submitted by Nolan Kelly (kellyno@oregonstate.edu) on 2016-06-01T19:50:31Z No. of bitstreams: 1 Polagye--Acoustic_Characterization_of_a_Hydrokinetic_Turbine--EWTEC2015_Revision.pdf: 453936 bytes, checksum: c19858ce8df604e0c2b8bdf4c7586e8a (MD5)

Relationships

In Administrative Set:
Last modified: 07/06/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items