Date

2017

Document Type

Thesis

Degree

Master of Science

Department

Mechanical Engineering

First Adviser

Banerjee, Arindam

Abstract

Tidal turbines when subjected to yawed inflow condition exhibit a deficit in performance. In addition to the reduction in the ability of the turbine to capture the kinetic energy of the flow, yawed inflow effects the downstream wake propagation and recovery. Investigation into the downstream wake of a tidal turbine is important for the optimization of the installation of tidal turbine arrays. Experiments were run to capture the velocity profile of the wake of the yawed tidal turbine at various downstream locations including x/R’s of 1.0, 2.0 and 4.0. Experiments were run at 0, 5, 10 and 15 degrees of yaw, and at varying radial locations from the rotor of the turbine from a z/R of 0.50 to 1.25. The purpose of this thesis is to characterize the downstream near wake characteristics of a yawed tidal turbine using various parameters, including non-dimensional velocity, swirl number, skewness, kurtosis and turbulence intensity.

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