Experimental and numerical simulation of extreme operational conditions for horizontal axis wind turbines based on the IEC standard

Shirzadeh, Kamran; Hangan, Horia; Crawford, Curran

doi:https://doi.org/10.5194/wes-5-1755-2020

Articles | Volume 5, issue 4

https://doi.org/10.5194/wes-5-1755-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/wes-5-1755-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 5, issue 4

Research article

|

21 Dec 2020

Research article |

| 21 Dec 2020

Experimental and numerical simulation of extreme operational conditions for horizontal axis wind turbines based on the IEC standard

Kamran Shirzadeh, Horia Hangan, and Curran Crawford

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Final revised paper (published on 21 Dec 2020)
Preprint (discussion started on 04 May 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of WES-2020-76', Anonymous Referee #1, 29 May 2020
- AC1: 'Answer to Comments', Kamran Shirzadeh Ajirlo, 11 Jul 2020
RC2: 'Review for "Numerical and Experimental Simulation of Extreme Operational Conditions for Horizontal Axis Wind Turbines Based on the IEC Standard"', Anonymous Referee #2, 02 Jun 2020
- AC2: 'Answer to Comments', Kamran Shirzadeh Ajirlo, 11 Jul 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Kamran Shirzadeh Ajirlo on behalf of the Authors (11 Jul 2020) Manuscript

ED: Referee Nomination & Report Request started (25 Jul 2020) by Raúl Bayoán Cal

RR by Anonymous Referee #2 (06 Aug 2020)

RR by Anonymous Referee #1 (10 Aug 2020)

ED: Reconsider after major revisions (21 Aug 2020) by Raúl Bayoán Cal

AR by Kamran Shirzadeh Ajirlo on behalf of the Authors (17 Sep 2020) Manuscript

ED: Referee Nomination & Report Request started (21 Sep 2020) by Raúl Bayoán Cal

RR by Anonymous Referee #2 (05 Oct 2020)

Suggestions for revision or reasons for rejection

Overall, the quality of this manuscript has significantly improved after two major revisions. Nevertheless, there are some improvements that should be made (see also comments in the attached PDF (comments are visible using the adobe acrobat reader or okular).
- the document should be checked again for grammatical errors and typos - some things are marked in the attached PDF
- ll.28 probably, you could rephrase that paragraph since currently, the question arises why you are using the IEC gust when it is far away from a real gust
- ll.208 since your TSR is very low, you are already in the order of magnitude of 4 rotor revolutions during the 5s gust and the question arises to me why it is necessary to introduce the gust propagation time. It would help to motivate why this is more appropriate. Also, the sentence "For a scaled wind turbine in the wind tunnel 4 rotor revolutions happen on the order of a second at the nominal operating condition." is not true for your setup, so you should rephrase it.
- ll. 289 please clarify whether you switched the fan power gradually , "switching fans to 30% for 1.6 s" reads like there was no gradual increase.
- for your whole argumentation, it would be favorable to plot/add the simplified gust in fig. 12 d-g since you are aiming to match the simplified gust and not the IEC gust with your control - the results will match much better.

For future publications, please make sure your manuscript has a good quality, structure and use of language when handing it in for the first time.
Also, when publishing more on the capability of the WindEEE Dome about the extreme wind conditions, I would recommend
- verifying the reproducibility of events
- using a phase average (+filter if necessary) to have a smooth gust information
- showing the unprocessed data so that the fluctuations that are currently averaged out are also presented to the reader
- commenting on all velocity components: you do have the information and if you can show that there are no/small v and w components, this is also an important information.
- splitting the figures. It is really hard to look at a figure that extends over several pages. It is much easier to have a figure for the shear, one for the EOG with fan power and one for the EOG with blockage where you can directly take the information from the caption.

Referee Report: PDF

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RR by Anonymous Referee #1 (16 Oct 2020)

ED: Publish subject to minor revisions (review by editor) (16 Oct 2020) by Raúl Bayoán Cal

AR by Kamran Shirzadeh Ajirlo on behalf of the Authors (27 Oct 2020) Author's response

ED: Publish as is (09 Nov 2020) by Raúl Bayoán Cal

ED: Publish as is (12 Nov 2020) by Jakob Mann (Chief editor)

AR by Kamran Shirzadeh Ajirlo on behalf of the Authors (13 Nov 2020) Manuscript

Short summary

The main goal of this study is to develop a physical simulation of some extreme wind conditions that are defined by the IEC standard. This has been performed by a hybrid numerical–experimental approach with a relevant scaling. Being able to simulate these dynamic flow fields can generate decisive results for future scholars working in the wind energy sector to make these wind energy systems more reliable and finally helps to accelerate the reduction of the cost of electricity.