Optimization Design of Lattice Structures in Internal Cooling Channel of Turbine Blade

Round 1

Reviewer 1 Report

1. Interesting research in a decent manuscript whose strength is validating simulations and experiments and whose weakness is presentation of results.
2. Abstract is okay but is not likely to entice the readership to continue reading the rest of the manuscript.
   • Results are only presented in weak, qualitative fashion. Highest quality expression of main conclusions or interpretations is quantitative results discussed in the broadest context possible, e.g., percent performance improvement compared to a declared benchmark. Currently, the claimed results “optimal lattice structure has better heat transfer and mechanical performances than the non-optimal lattice structure” are very weak and will not entice a reader to continue beyond the abstract.
     • The cited work of Bailong is strongly worded in the Introduction and provides a useful prototype for rewording the results presented in this manuscript: “Bailong et al. [31] carried out an optimal design…showed that…increased by 121.5% and 77.3%, respectively.”
   • Introduction is very well done with omission of some recently published methods
     • Cited optimization methods are generally old classical ones, while cited applications (particularly additive manufacturing) are very up to date.
     • Optimization by Pontryagin’s method on Hamiltonian systems using stiffness, mass moments, and n^th-order natural frequencies is presented in https://doi.org/10.3390/aerospace6090093, but omitted as an alternative or recommendation for future work.
   • Equations are scientifically sound and aid repeatability, but are poorly presented with variable justification and alignments.
   • Figures are okay, but appear to be screenshots overlayed in places over manuscript text.
     • Internal font size is illegibly small in figure 7 which also has overlapping, illegible texts and confusing, repeated sub-figure indexing. Numerical data in black font against colored background will be illegible to readers. Figure 8 and 9 also have illegible font sizes.
     • Line styles and sizes are identical in figure 3, figure 9, figure 10 making the plotted data indistinguishable when read on a printed hardcopy, especially in black and white.
   • Tables of results are completely omitted. Means and standard deviations of comparisons (e.g. figures 6,8 9,10) should be presented in a table and in text in the Conclusions and the first sentence of the Abstract to attract readers to continue to read beyond the abstract.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Unfortunately, the paper is presented with poor academic writing skills. Neither, the reviewers nor the readers can easily understand the paper. 

Extensive proofreading is required. At the moment the language of the paper is unpublishable. Below are some examples. Please be aware that those are only a few examples, you have to proofread the entire paper. 

1-Cooling structures such as film, rib/pin- 9fin, and impingement jet great improve cooling efficiency of turbine blades>>>>

2-The results show that the optimal lattice structure has better 20
heat transfer and mechanical >>>>

3-Generally, the increase of turbine inlet temperature will improve the efficiency of turbomachinery as well as cause additional damage to the turbine blade>>>>>>

4-Lattice structure (LS) is one of the most efficient cooling technologies among them and also has great advantages in mechanical performance>>>

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Once the language of the paper is edited, the reviewer can further examine the scientific content. Therefore, I recommend major changes. 

 

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

The reviewer is satisfied with the improvements. 

Reviewer 2 Report

The authors have successfully addressed my comments. 

The authors present an original manuscript with  a novel approach of an integrated optimization method of lattice cooling structure used at the trailing edge of turbine blades concerning with heat transfer and mechanical performances was presented.

The proposed method has been validated. 

The findings are significant and represented in an excellent manner (For Op-I (Nu and  were the objectives), the overall sensitivity of D and  for Nu was higher than  . The single sensitivity of D for  was higher than Nu; the single sensitivity of ω for Nu was higher
than  . Compared to the initial LS, Nu increased by 24.1% and  decreased by 31%, respectively. The optimal structural parameters were: 2.3mm≤D≤2.9mm, and 52°≤≤66°. The fitting function of Pareto fronts of Op-I and Op-II was obtained, which may provide a guidance for structural parameters design for LS channel used in turbine blades. 

 

Turbine blade cooling is amongst the trending topics. Therefore, I think this paper will be interesting for readers. 

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Based on the above evaluation, I believe that the paper has been significantly improved, thus; I have no further comments.