Using newly collected data from a tidal power site in Puget Sound, WA, metrics for turbulence quantification are assessed and discussed. The quality of raw ping Acoustic Doppler Current Profiler (ADCP) data for turbulence studies is evaluated against Acoustic Doppler Velocimeter (ADV) data at a point. Removal of Doppler noise from the raw ping data is shown to be a crucial step in turbulence quantification. Excluding periods of slack tide, the turbulent intensity estimates at a height of 4.6 m above the seabed are 8% and 11% from the ADCP and ADV, respectively. Estimates of the turbulent dissipation rate are more variable, from 10e-3 to 10e-1 W/m^3. An example analysis of coherent Turbulent Kinetic Energy (TKE) is presented.
Revised: August 18, 2010 |
Published: August 1, 2010
Citation
Thomson J., M.C. Richmond, B. Polagye, and V. Durgesh. 2010.Quantifying Turbulence for Tidal Power Applications. In OCEANS 2010 MTS/IEEE: Innerspace: a Global Responsibility, Paper No. 100514-042. Piscataway, New Jersey:IEEE.PNNL-SA-74185.