Effects of Gurney Flap on the performance of Diffuser Augmented Wind Turbines

Vinit Dighe; Francesco Avallone; Juan Tang; Gerard van Bussel

doi:10.2514/6.2017-1382

Effects of Gurney Flap on the performance of Diffuser Augmented Wind Turbines

Vinit Dighe, Francesco Avallone, Juan Tang, Gerard van Bussel

Wind Energy

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

14 Citations (Scopus)

Abstract

In this paper, a numerical investigation on the effect of gurney ap (GF) on the performance of a diffuser augmented wind turbine (DAWT) is presented. The flow-field around the DAWT is obtained by solving the Reynolds-averaged-Navier-Stokes (RANS) equations. The turbine is modelled as an uniformly loaded actuator disc (AD) that imposes a resistance to the passage of the flow. Comparison of the numerical results with experimental measurements in similar conditions shows that the numerical approach used satisfactorily reproduces the mean flowfield. GF heights equal to 2% and 4% of the diffuser chord length were investigated. Results show that separation induced by GF creates a low pressure region at the diffuser exit, that increases the mass ow through the diffuser and the power coeffcient of the DAWT.

Original language	English
Title of host publication	35th Wind Energy Symposium
Subtitle of host publication	AIAA SciTech Forum, Grapevine, Texas
Number of pages	11
ISBN (Electronic)	978-1-62410-456-5
DOIs	https://doi.org/10.2514/6.2017-1382
Publication status	Published - 2017
Event	35th Wind Energy Symposium - Grapevine, United States Duration: 9 Jan 2017 → 13 Jan 2017 Conference number: 35 http://arc.aiaa.org/doi/book/10.2514/MWES17

Conference

Conference	35th Wind Energy Symposium
Country/Territory	United States
City	Grapevine
Period	9/01/17 → 13/01/17
Internet address	http://arc.aiaa.org/doi/book/10.2514/MWES17

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@inproceedings{beaf8ca3d0b3483e838a876616a08b6a,

title = "Effects of Gurney Flap on the performance of Diffuser Augmented Wind Turbines",

abstract = "In this paper, a numerical investigation on the effect of gurney ap (GF) on the performance of a diffuser augmented wind turbine (DAWT) is presented. The flow-field around the DAWT is obtained by solving the Reynolds-averaged-Navier-Stokes (RANS) equations. The turbine is modelled as an uniformly loaded actuator disc (AD) that imposes a resistance to the passage of the flow. Comparison of the numerical results with experimental measurements in similar conditions shows that the numerical approach used satisfactorily reproduces the mean flowfield. GF heights equal to 2% and 4% of the diffuser chord length were investigated. Results show that separation induced by GF creates a low pressure region at the diffuser exit, that increases the mass ow through the diffuser and the power coeffcient of the DAWT. ",

author = "Vinit Dighe and Francesco Avallone and Juan Tang and {van Bussel}, Gerard",

year = "2017",

doi = "10.2514/6.2017-1382",

language = "English",

booktitle = "35th Wind Energy Symposium",

note = "35th Wind Energy Symposium ; Conference date: 09-01-2017 Through 13-01-2017",

url = "http://arc.aiaa.org/doi/book/10.2514/MWES17",

}

TY - GEN

T1 - Effects of Gurney Flap on the performance of Diffuser Augmented Wind Turbines

AU - Dighe, Vinit

AU - Avallone, Francesco

AU - Tang, Juan

AU - van Bussel, Gerard

N1 - Conference code: 35

PY - 2017

Y1 - 2017

N2 - In this paper, a numerical investigation on the effect of gurney ap (GF) on the performance of a diffuser augmented wind turbine (DAWT) is presented. The flow-field around the DAWT is obtained by solving the Reynolds-averaged-Navier-Stokes (RANS) equations. The turbine is modelled as an uniformly loaded actuator disc (AD) that imposes a resistance to the passage of the flow. Comparison of the numerical results with experimental measurements in similar conditions shows that the numerical approach used satisfactorily reproduces the mean flowfield. GF heights equal to 2% and 4% of the diffuser chord length were investigated. Results show that separation induced by GF creates a low pressure region at the diffuser exit, that increases the mass ow through the diffuser and the power coeffcient of the DAWT.

AB - In this paper, a numerical investigation on the effect of gurney ap (GF) on the performance of a diffuser augmented wind turbine (DAWT) is presented. The flow-field around the DAWT is obtained by solving the Reynolds-averaged-Navier-Stokes (RANS) equations. The turbine is modelled as an uniformly loaded actuator disc (AD) that imposes a resistance to the passage of the flow. Comparison of the numerical results with experimental measurements in similar conditions shows that the numerical approach used satisfactorily reproduces the mean flowfield. GF heights equal to 2% and 4% of the diffuser chord length were investigated. Results show that separation induced by GF creates a low pressure region at the diffuser exit, that increases the mass ow through the diffuser and the power coeffcient of the DAWT.

U2 - 10.2514/6.2017-1382

DO - 10.2514/6.2017-1382

M3 - Conference contribution

BT - 35th Wind Energy Symposium

T2 - 35th Wind Energy Symposium

Y2 - 9 January 2017 through 13 January 2017

ER -

Effects of Gurney Flap on the performance of Diffuser Augmented Wind Turbines

Abstract

Conference

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