Experimental evaluation of motion compensated ADV measurements for in-stream hydrokinetic applications

Conference Paper

Title: Experimental evaluation of motion compensated ADV measurements for in-stream hydrokinetic applications

Author:

VanZwieten, J.; Egeland, M.; von Ellenrieder, K.; Lovenbury, J.; Kilcher, L.

Publication Date:

May 4, 2015

Event Name:

11th Current, Waves and Turbulence Measurement (CWTM) Workshop

Event Location:

St. Petersburg, Florida, USA

Pages:

Publisher:

IEEE

Affiliation:

Southeast National Marine Renewable Energy Center (SNMREC), Florida Atlantic University, National Renewable Energy Laboratory (NREL)

Resource:

Instrumentation

Engineering:

Hydrodynamics

Document Access

Website:

External Link

Citation

VanZwieten, J.; Egeland, M.; von Ellenrieder, K.; Lovenbury, J.; Kilcher, L. (2015). Experimental evaluation of motion compensated ADV measurements for in-stream hydrokinetic applications. Paper presented at 11th Current, Waves and Turbulence Measurement (CWTM) Workshop, St. Petersburg, Florida, USA.

Abstract

This study quantifies the impact of Inertial Measurement Unit (IMU) error on turbulence estimates calculated from motion compensated Acoustic Doppler Velocimeter (ADV) measurements. This analysis shows that IMU error can completely mask the turbulent spectra in the horizontal plane in low current areas (0.4 m/s) and reduce this range to 4-60 seconds in stronger tidal flows. However, even in an evaluated low current area (0.4 m/s) vertical spectra can be measure at periods between 1-60 seconds, with stronger current areas having a measureable frequency range with periods from 0.8-80 seconds.