Turbulence in Grand Passage Nova Scotia: Measures of intermittency

Principal Investigators:

Dr. Alex Hay, Dalhousie University & Justine McMillan, Dalhousie University Department of Oceanography

Start Date: April 2016

End Date: December 2016

Turbulence research is very important to advancing the in-stream tidal energy sector, however, turbulence in general is not well understood.  Measurements at prospective turbine locations is essential prior to development, given the high degree of spatial variability between sites.  Research in turbulence is still in its infancy (in particular compared to the wind industry) but is advancing rapidly as new techniques and modeling work are developed and tested worldwide.

The purpose of this study is to compute higher order statistics on velocity shear probe data (collected from Grand Passage in Nova Scotia in 2013) and compare the results with theoretical predictions to better understand current velocity intensity (intermittency) and its potential impact on turbine power production.

A key element of the proposed research is the computation and analysis of ‘real ocean’ measurements collected using advanced technologies.  Further, this work will have important implications to two on-going ‘turbulence’ initiatives, namely the FORCE VECTRON project and the Rockland In-STREAM project.

The project results will make important contributions to better understand how turbulence can impact on turbine power production.

Reports:

Final Report [PDF]