CFD Study of the Non-Linear Physical Phenomena of the TLP of a 15-MW-Class FOWT under Extreme Waves

Round 1

Reviewer 1 Report

1)  'the vertical motion characteristics of the  TLP-type FOWT and the non-linear physical phenomena of the tendon and platform of  the FOWT were investigated',

1) yes investigated for which reason, what is the goal or reason to investigat the  TLP-type FOWT and the non-linear physical phenomena of the tendon and platform of  the FOWT were investigated.

2) The characteristics of the  motion and tendon tension responses of the TLP-type FOWT were investigated using whipping simulations.

2) ok, but what is the reason to investigate  the  motion and tendon tension responses.

The introduction should be claire, and you should cite the goal behind this reseach clearly.

 

3) it would be appreciable to incorporate material and numerical method as section in the paper.

 

4) To accept the paper, what is the validation test chosen for this paper.

5) the conclusion should be written to be clear, I don't apreciate conclusion as form of notes.

 

 

 

 

 

 

The english of the paper is good, Minor editing of English language is required

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

I have carefully read and analyzed the paper. It deals with a numerical investigation of springing and ringing on a TLP-type floating offshore wind turbine. Furthermore, the paper tries to model the FOWT under the influence of irregular waves, as opposed to regular waves which are commonly found in literature.

 

Introduction: Please separate the introduction text into several paragraphs to improve the overall readability of the chapter.

2.3 Numerical method: No convergence study is done or presented. Even though the mesh sizes may seem sound, an estimation and reporting of uncertainty due to discretization in CFD applications is highly recommended. The authors are highly encouraged to do this procedure as described in:

ASME (2008) ‘Procedure for Estimation and Reporting of Uncertainty Due to Discretization in CFD Applications’, Journal of Fluids Engineering, 130(078001). Available at: https://doi.org/10.1115/1.2960953.

Table 3: The SIMPLE method is a steady-state method, but the authors state that this is a transient numerical simulation. Please explain this.

Table 3: No turbulence models are taken into account, how do the authors justify this decision. In what way could the turbulence model change the numerical model results. Please explain this and add it to the article.

Figure 12: The font of the text on the figure is too large.

No comments. 

Author Response

Please see the attachment

Author Response File: Author Response.pdf