Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for subject:(polychromatic waves). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Tasmania

1. Mitchell Ferguson, TG. An experimental investigation into WEC operation in realistic sea states using PIV.

Degree: 2016, University of Tasmania

The focus of this study is on two key aspects of model scale experimentation when investigating the operation of ocean wave energy converters: the type of wave in which the device is exposed to; and the presence of three dimensional effects within and around the device. Scale model experiments were performed on an oscillating water column (OWC) in different conditions utilising particle image velocimetry (PIV). PIV is an advanced experimental technique which captures full velocity fields without interference with the flow and can be used to provide both qualitative and quantitative flow visualisation. To investigate the impact of wave type on the operation of an OWC, experiments were performed in three wave types: regular, polychromatic and irregular waves. While regular and irregular waves are often used, polychromatic waves offer an intermediate option which has properties of both. When investigating polychromatic waves phase averaging was shown to be a useful tool to generate averaged results for both PIV velocity fields and other more conventional data sources with a reduction in uncertainty. It was seen that testing in regular waves results in unrealistic harmonic effects which impact on device performance, in particular the formation and size of vortices. For experiments in irregular waves, a linear relationship was identified between the energy within vortices and the total energy within the velocity field. Identifying the presence of three dimensional effects was achieved by capturing two dimensional (2D) flow velocities at four transverse planes. This showed the transition between inflow and outflow conditions occurs at different times across the device. Velocity field divergence was calculated and large vortices were identified at the inside lip of the sidewall during inflow. It also indicated the device utilises the volume outside of its sidewalls during outflow, allowing an effective width greater than the extents of its sidewalls. This results in the potential for more power to be generated during outflow than inflow. This study has revealed the importance of performing experiments in realistic sea states and has highlighted the value of experiments in polychromatic and/or irregular waves early in the design process. The use of PIV provided a vast amount of information on the operation and performance of wave energy converters and should be strongly considered when performing quantitative flow visualisation, comparative studies and validation of numerical models.

Subjects/Keywords: wave energy converter (wec); particle image velocimetry (piv); oscillating water column (owc); model scale experiments; polychromatic waves; irregular waves; 30 flow; phase averaging

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Mitchell Ferguson, T. (2016). An experimental investigation into WEC operation in realistic sea states using PIV. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/23470/7/Mitchell_Ferguson_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/23470/1/Mitchell_Ferguson_whole_thesis.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Mitchell Ferguson, TG. “An experimental investigation into WEC operation in realistic sea states using PIV.” 2016. Thesis, University of Tasmania. Accessed July 02, 2020. https://eprints.utas.edu.au/23470/7/Mitchell_Ferguson_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/23470/1/Mitchell_Ferguson_whole_thesis.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Mitchell Ferguson, TG. “An experimental investigation into WEC operation in realistic sea states using PIV.” 2016. Web. 02 Jul 2020.

Vancouver:

Mitchell Ferguson T. An experimental investigation into WEC operation in realistic sea states using PIV. [Internet] [Thesis]. University of Tasmania; 2016. [cited 2020 Jul 02]. Available from: https://eprints.utas.edu.au/23470/7/Mitchell_Ferguson_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/23470/1/Mitchell_Ferguson_whole_thesis.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mitchell Ferguson T. An experimental investigation into WEC operation in realistic sea states using PIV. [Thesis]. University of Tasmania; 2016. Available from: https://eprints.utas.edu.au/23470/7/Mitchell_Ferguson_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/23470/1/Mitchell_Ferguson_whole_thesis.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.