Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines

Stephanie Ordonez-Sanchez, Kate Porter, Matthew Allmark , Cameron Johnstone, Tim O'Doherty

Research output: Contribution to conferencePaper

Abstract

The durability and reliability of tidal energy systems can be compromised by the harsh environments that the tidal stream turbines need to withstand. These loadings will increase substantially if the turbines are deployed in exposed sites where high magnitude waves will affect the turbine in combination with fast tidal currents. The loadings affecting the turbines can be modelled using various numerical or analytical methods; each of them have their own advantages and disadvantages. To understand the limitations arising with the use of numerical solutions, the outcomes can be verified with practical work. In this paper, a Blade Element Momentum coupled with wave solutions is used to predict the performance of a scaled turbine in a flume and a tow tank. The analytical and experimental work is analysed for combinations of flow speeds of 0.5 and 1.0 m/s, wave heights of 0.2 and 0.4 and wave periods of 1.5 and 1.7 s. It was found that good agreement between the model and the experimental work was observed when comparing the data sets at high flow conditions. However, even if the average values were similar, the model tend to under predict the maximum and minimum values obtained in the experiments. When looking at the results of low flow velocities, the agreement between the average and time series was poorer.

Conference

Conference4th Asian Wave and Tidal Energy Conference
Abbreviated titleAWTEC 2018
CountryTaiwan, Province of China
CityTaipei
Period9/09/1813/09/18

Fingerprint

Momentum
Turbines
Flow velocity
Time series
Durability
Experiments

Keywords

  • tidal turbine
  • blade element momentum theory
  • wave-current interactions
  • experiments
  • loading

Cite this

Ordonez-Sanchez, S., Porter, K., Allmark , M., Johnstone, C., & O'Doherty, T. (2018). Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines. Paper presented at 4th Asian Wave and Tidal Energy Conference , Taipei , Taiwan, Province of China.
Ordonez-Sanchez, Stephanie ; Porter, Kate ; Allmark , Matthew ; Johnstone, Cameron ; O'Doherty, Tim . / Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines. Paper presented at 4th Asian Wave and Tidal Energy Conference , Taipei , Taiwan, Province of China.8 p.
@conference{ecd8dc710a474fc6b42c85264714294d,
title = "Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines",
abstract = "The durability and reliability of tidal energy systems can be compromised by the harsh environments that the tidal stream turbines need to withstand. These loadings will increase substantially if the turbines are deployed in exposed sites where high magnitude waves will affect the turbine in combination with fast tidal currents. The loadings affecting the turbines can be modelled using various numerical or analytical methods; each of them have their own advantages and disadvantages. To understand the limitations arising with the use of numerical solutions, the outcomes can be verified with practical work. In this paper, a Blade Element Momentum coupled with wave solutions is used to predict the performance of a scaled turbine in a flume and a tow tank. The analytical and experimental work is analysed for combinations of flow speeds of 0.5 and 1.0 m/s, wave heights of 0.2 and 0.4 and wave periods of 1.5 and 1.7 s. It was found that good agreement between the model and the experimental work was observed when comparing the data sets at high flow conditions. However, even if the average values were similar, the model tend to under predict the maximum and minimum values obtained in the experiments. When looking at the results of low flow velocities, the agreement between the average and time series was poorer.",
keywords = "tidal turbine, blade element momentum theory, wave-current interactions, experiments, loading",
author = "Stephanie Ordonez-Sanchez and Kate Porter and Matthew Allmark and Cameron Johnstone and Tim O'Doherty",
year = "2018",
month = "9",
day = "9",
language = "English",
note = "4th Asian Wave and Tidal Energy Conference , AWTEC 2018 ; Conference date: 09-09-2018 Through 13-09-2018",

}

Ordonez-Sanchez, S, Porter, K, Allmark , M, Johnstone, C & O'Doherty, T 2018, 'Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines' Paper presented at 4th Asian Wave and Tidal Energy Conference , Taipei , Taiwan, Province of China, 9/09/18 - 13/09/18, .

Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines. / Ordonez-Sanchez, Stephanie; Porter, Kate; Allmark , Matthew ; Johnstone, Cameron; O'Doherty, Tim .

2018. Paper presented at 4th Asian Wave and Tidal Energy Conference , Taipei , Taiwan, Province of China.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines

AU - Ordonez-Sanchez, Stephanie

AU - Porter, Kate

AU - Allmark , Matthew

AU - Johnstone, Cameron

AU - O'Doherty, Tim

PY - 2018/9/9

Y1 - 2018/9/9

N2 - The durability and reliability of tidal energy systems can be compromised by the harsh environments that the tidal stream turbines need to withstand. These loadings will increase substantially if the turbines are deployed in exposed sites where high magnitude waves will affect the turbine in combination with fast tidal currents. The loadings affecting the turbines can be modelled using various numerical or analytical methods; each of them have their own advantages and disadvantages. To understand the limitations arising with the use of numerical solutions, the outcomes can be verified with practical work. In this paper, a Blade Element Momentum coupled with wave solutions is used to predict the performance of a scaled turbine in a flume and a tow tank. The analytical and experimental work is analysed for combinations of flow speeds of 0.5 and 1.0 m/s, wave heights of 0.2 and 0.4 and wave periods of 1.5 and 1.7 s. It was found that good agreement between the model and the experimental work was observed when comparing the data sets at high flow conditions. However, even if the average values were similar, the model tend to under predict the maximum and minimum values obtained in the experiments. When looking at the results of low flow velocities, the agreement between the average and time series was poorer.

AB - The durability and reliability of tidal energy systems can be compromised by the harsh environments that the tidal stream turbines need to withstand. These loadings will increase substantially if the turbines are deployed in exposed sites where high magnitude waves will affect the turbine in combination with fast tidal currents. The loadings affecting the turbines can be modelled using various numerical or analytical methods; each of them have their own advantages and disadvantages. To understand the limitations arising with the use of numerical solutions, the outcomes can be verified with practical work. In this paper, a Blade Element Momentum coupled with wave solutions is used to predict the performance of a scaled turbine in a flume and a tow tank. The analytical and experimental work is analysed for combinations of flow speeds of 0.5 and 1.0 m/s, wave heights of 0.2 and 0.4 and wave periods of 1.5 and 1.7 s. It was found that good agreement between the model and the experimental work was observed when comparing the data sets at high flow conditions. However, even if the average values were similar, the model tend to under predict the maximum and minimum values obtained in the experiments. When looking at the results of low flow velocities, the agreement between the average and time series was poorer.

KW - tidal turbine

KW - blade element momentum theory

KW - wave-current interactions

KW - experiments

KW - loading

UR - https://www.awtec2018.com/

M3 - Paper

ER -

Ordonez-Sanchez S, Porter K, Allmark M, Johnstone C, O'Doherty T. Blade element momentum theory to predict the effect of wave-current interactions on the performance of tidal stream turbines. 2018. Paper presented at 4th Asian Wave and Tidal Energy Conference , Taipei , Taiwan, Province of China.