Flow Characteristics Study of High-Parameter Multi-Stage Sleeve Control Valve

Round 1

Reviewer 1 Report

This paper is a numerical study of a multi-stage sleeve control valve with different openings. I applaud the authors for such an in-depth study, however the paper can be published with major modifications, and my comments are as follow:

1-      English writing needs some corrections, and some of the governing equations need to be re-typed

2-      Your abstract need some hints of results and with numbers (quantifying the results)

3-      Figure 4 must be re plotted and your figures should be consistent

4-      What is Cv (did you define it in the text?)

5-      The paper lacks recommendation and suggestion for a new design based on the simulation results, what changes in the geometry of valve need to be done for improvement ?

Author Response

Dear Editor and Reviewers,

Thank you very much for your recognition of our manuscript. The authors thank editors and reviewers for their comments to improve the quality of the paper. Your comments will be of great help to our future paper writing. We have carefully studied these comments and have made corrections. The modified content has been marked in the main body. The title of the article is "Flow characteristics study of high parameter multi-stage sleeve control valve." (Manuscript ID: processes-1800231) Looking forward to your approval.

Thank you.

Author Response File: Author Response.docx

Reviewer 2 Report

This paper is concerned with the Flow characteristics study of high parameter multi-stage sleeve 2 control valve. Improve the manuscript further, the authors should revise it taking into account the following comments:

1.      Why the pressure term is missing in the energy equation which is the vital part of compressible fluid.

2.      What is lambda and q in the equation 3.

3.      Explain in detail how the authors calculate meu dash in equation 8 and what does it represent.

4.      Boundary conditions are missing in the manuscript.

5.      Literature is not sufficient include some reference related to the topics: Journal of Thermal Analysis and Calorimetry (2021) 143:2775–2787. Advances in Mechanical Engineering 2021, DOI: 10.1177/16878140211010003.

6.      Why the error increases as the opening increases? 13% error is very large it’s not acceptable in numerical simulation.

7.      Many parameters are not well defined in equations 9 and 10.

8.      Discussion of figure 17 is missing and figure 18 is also missing.

9.      Improve the discussion of figure 13.

10.  Improve the quality of figures 3 and 4. It’s hard to read the values. Similarly, it’s hard to read the values of x axis in figures 9 to 12, 14, 16 and 17.

11.   Authors should add appropriate references for equations 3, 8, 9 and 10.

Comments for author File: Comments.pdf

Author Response

 Dear Editor and Reviewers,

The authors thank editors and reviewers for their comments to improve the quality of the paper. Your comments will be of great help to our future paper writing. We have carefully studied these comments and have made corrections. The modified content has been marked in the main body. The title of the article is "Flow characteristics study of high parameter multi-stage sleeve control valve." (Manuscript ID: processes-1800231) Looking forward to your approval.

Thank you.

Author Response File: Author Response.docx

Round 2

Reviewer 2 Report

Accepted