Unsteady hydrodynamics of full-scale tidal turbines

Gabriel Scarlett; Ton van den Bremer; Brian Sellar; Ignazio Maria Viola

Unsteady hydrodynamics of full-scale tidal turbines

Gabriel Scarlett, Ton van den Bremer, Brian Sellar, Ignazio Maria Viola

School of Engineering

Research output: Contribution to conference › Abstract › peer-review

Abstract / Description of output

Due to the lack of full-scale measurements of the flow around tidal turbine blades, it is not clear if unsteadiness in the background flow can induce dynamic stall and the significance of this on the rotor’s performance. To investigate, we develop a model that couples dynamic stall, rotational augmentation and blade element momentum theory with real flow measurements. We found that large, realistic waves lead to large fluctuations in power and thrust, mostly due to inviscid unsteady hydrodynamic effects near the blade tip. Conversely, flow fluctuations have little effect on the rotor’s mean thrust and power.

Original language	English
Publication status	Published - 2018
Event	6th Oxford Tidal Energy Workshop - Oxford, United Kingdom Duration: 26 Mar 2018 → 27 Mar 2018

Conference

Conference	6th Oxford Tidal Energy Workshop
Abbreviated title	OTE2018
Country/Territory	United Kingdom
City	Oxford
Period	26/03/18 → 27/03/18

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@conference{c70979ef479f4546a5ce54ca912c2650,

title = "Unsteady hydrodynamics of full-scale tidal turbines",

abstract = "Due to the lack of full-scale measurements of the flow around tidal turbine blades, it is not clear if unsteadiness in the background flow can induce dynamic stall and the significance of this on the rotor{\textquoteright}s performance. To investigate, we develop a model that couples dynamic stall, rotational augmentation and blade element momentum theory with real flow measurements. We found that large, realistic waves lead to large fluctuations in power and thrust, mostly due to inviscid unsteady hydrodynamic effects near the blade tip. Conversely, flow fluctuations have little effect on the rotor{\textquoteright}s mean thrust and power.",

author = "Gabriel Scarlett and {van den Bremer}, Ton and Brian Sellar and Viola, {Ignazio Maria}",

year = "2018",

language = "English",

note = "6th Oxford Tidal Energy Workshop, OTE2018 ; Conference date: 26-03-2018 Through 27-03-2018",

}

TY - CONF

T1 - Unsteady hydrodynamics of full-scale tidal turbines

AU - Scarlett, Gabriel

AU - van den Bremer, Ton

AU - Sellar, Brian

AU - Viola, Ignazio Maria

PY - 2018

Y1 - 2018

N2 - Due to the lack of full-scale measurements of the flow around tidal turbine blades, it is not clear if unsteadiness in the background flow can induce dynamic stall and the significance of this on the rotor’s performance. To investigate, we develop a model that couples dynamic stall, rotational augmentation and blade element momentum theory with real flow measurements. We found that large, realistic waves lead to large fluctuations in power and thrust, mostly due to inviscid unsteady hydrodynamic effects near the blade tip. Conversely, flow fluctuations have little effect on the rotor’s mean thrust and power.

AB - Due to the lack of full-scale measurements of the flow around tidal turbine blades, it is not clear if unsteadiness in the background flow can induce dynamic stall and the significance of this on the rotor’s performance. To investigate, we develop a model that couples dynamic stall, rotational augmentation and blade element momentum theory with real flow measurements. We found that large, realistic waves lead to large fluctuations in power and thrust, mostly due to inviscid unsteady hydrodynamic effects near the blade tip. Conversely, flow fluctuations have little effect on the rotor’s mean thrust and power.

M3 - Abstract

T2 - 6th Oxford Tidal Energy Workshop

Y2 - 26 March 2018 through 27 March 2018

ER -

Unsteady hydrodynamics of full-scale tidal turbines

Abstract / Description of output

Conference

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