A Comparison of Wake Measurements in Motor-Driven and Flow-Driven Turbine Experiments

Author: Daniel Araya, John Dabiri

Publication: Springer-Verlag Berlin Heidelberg

Year Published: 2015

We present experimental data to compare and contrast the wake characteristics of a turbine whose rotation is either driven by the oncoming flow or prescribed by a motor. Velocity measurements are collected using two-dimensional particle image velocimetry in the nearwake region of a lift-based, vertical-axis turbine. The wake of this turbine is characterized by a spanwise asymmetric velocity profile which is found to be strongly dependent on the turbine tip speed ratio (TSR), while only weakly dependent on Reynolds number (Re). For a given Re, the TSR is controlled.

Categories: Synergy with Tall and Short Turbines, Turbine Wake

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