Dependence of Pressure Characteristics of Pressurized Pulse Water Jet Chamber on Nozzle Diameter
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsIn this manuscript, the authors have analyzed the influence of nozzle diameter on the pressure characteristics of the pressurized pulse water jet. A bunch of studies have already been reported in the literature on the pressurized pulse water jet. This analysis only builds incrementally over those studies to investigate the impact of nozzle diameter.
There are mathematical inconsistencies in the present version of the manuscript. It is unclear how Eq. 13 is derived. Eqs. 11 & 12 are identical. Is this a typo? Also, Eqs. 13 & 14 appear to be dimensionally incorrect.
The authors also need to thoroughly revise the manuscript to meet the standards of a scientific journal. Figure Captions should be clearer, and the legends should be clearly visible. A few instances of typographical mistakes are also noticed in the present version of the manuscript.
Comments on the Quality of English LanguageThe authors need to revise the manuscript for language usage.
Author Response
Comments1:In this manuscript, the authors have analyzed the influence of nozzle diameter on the pressure characteristics of the pressurized pulse water jet. A bunch of studies have already been reported in the literature on the pressurized pulse water jet. This analysis only builds incrementally over those studies to investigate the impact of nozzle diameter.
There are mathematical inconsistencies in the present version of the manuscript. It is unclear how Eq. 13 is derived. Eqs. 11 & 12 are identical. Is this a typo? Also, Eqs. 13 & 14 appear to be dimensionally incorrect.
The authors also need to thoroughly revise the manuscript to meet the standards of a scientific journal. Figure Captions should be clearer, and the legends should be clearly visible. A few instances of typographical mistakes are also noticed in the present version of the manuscript.
Response 1:Thank you very much for your careful observation. Some typographical errors occurred in some formulas in the paper due to changes in the reading tools, and we have corrected them. The errors in the formula have been corrected, especially Formula (11), and unclear charts have been replaced.
Reviewer 2 Report
Comments and Suggestions for AuthorsSome comments are required for improving the quality of contents.
- Abstract and Conclusion should provide the contributed values e.g. the recommended nozzle diameter.
- In topic 3.4. Error analysis, statistical analysis approaches should be applied to analyses the results.
- Figure 2 and 3 are the same, eliminate one figure.
- More explanation is required for Figure 6.
- In result and discussion, the relationship between the theoretic critical nozzle diameter and the experimental nozzle diameter should be discussed.
- Based on the experiment, please provide the reason why the parameters of 12 MPa oil inlet pressure and 0.2 MPa water inlet pressure was selected as the water pressure is also the significant effect to the pressurized pulse water jet.
- According to the predicted equations, what are the accuracy of the equations?
- What is the application according to the contribution of this research?
Comments on the Quality of English Language
- Proofread is required.
Author Response
Comments1：- Abstract and Conclusion should provide the contributed values e.g. the recommended nozzle diameter.
Response 1:Thank you very much for your suggestion. We have added corresponding contribution values to the summary and conclusion.
Comments2：- In topic 3.4. Error analysis, statistical analysis approaches should be applied to analyses the results.
Response 2:Thank you very much for your suggestion. The error analysis is to analyze the data more accurately. During the test, we found that the pressure of the fluid in the pressurized chamber was very regular, and the error and contrast were almost negligible. Therefore, we did not Mark the variance in the results.
Comments3：- Figure 2 and 3 are the same, eliminate one figure.
Response 3:Thank you very much for your careful guidance on our draft. We have replaced the correct picture.
Comments4：- More explanation is required for Figure 6.
Response 4:We have further listed the detailed parameters of the nozzle in Figure 6. Thank you for your careful review.
Comments5：- In result and discussion, the relationship between the theoretic critical nozzle diameter and the experimental nozzle diameter should be discussed.
Response 5:We have added a corresponding discussion section to Section 4.4 of the draft, and thank you very much for your suggestions.
Comments6：- Based on the experiment, please provide the reason why the parameters of 12 MPa oil inlet pressure and 0.2 MPa water inlet pressure was selected as the water pressure is also the significant effect to the pressurized pulse water jet.
Response 6:You are very insightful. This is the core of our parameter setting. We are sorry that we didn't explain it in the draft. We have added corresponding explanations to the experimental design. Thank you for your suggestion.
Comments7：- According to the predicted equations, what are the accuracy of the equations?
Response 7:For the prediction equation, it can be seen from the determination coefficient after our fitting that R2=0.99, which is a very approximate coefficient. We can obtain the pressurizing capacity of the corresponding nozzle under the current device parameters. We also added some of the discussion in the draft. Thank you very much for your careful review.
Comments8：- What is the application according to the contribution of this research?
Response 8: In the destruction of hard rock in deep underground spaces, ultra-high pressure pulsed water jets play a significant advantage in water hammer. However, most of the generation and acquisition of ultra-high pressure comes from the water pump. From the pump source to the output nozzle, ultra-high pressure fluid needs to be exported from a long distance. Energy loss and safety are indispensable. The pressurized pulsed water jet technology can directly obtain ultra-high pressure pulsed water jets and high-pressure pulsed water jets at the outlet of the nozzle by adjusting the nozzle diameter. The waste of energy and intermediate links are avoided. Therefore, the research significance of this paper lies in adapting the pressurized pulsed water jet generator with corresponding parameters, so that the device can output jets with ideal pressure characteristics.
Round 2
Reviewer 1 Report
Comments and Suggestions for AuthorsThe inconsistency about Eqs. (11)-(13) remains unresolved in the revised manuscript. In Figure 2, the nozzle diameter is defined as d. Then what do the nozzle inner diameter d1 and outer diameter d2 correspond to in Eq. (11). For the consistency of Eq. (13), the authors must explicitly define the relationships between d1, d2 and d; and p1, p2 and pd. Without resolving this issue, I cannot recommend to accept this manuscript.
Comments on the Quality of English LanguageThe language usage is fine.
Author Response
Comments1:The inconsistency about Eqs. (11)-(13) remains unresolved in the revised manuscript. In Figure 2, the nozzle diameter is defined as d. Then what do the nozzle inner diameter d1 and outer diameter d2 correspond to in Eq. (11). For the consistency of Eq. (13), the authors must explicitly define the relationships between d1, d2 and d; and p1, p2 and pd. Without resolving this issue, I cannot recommend to accept this manuscript.
Response 1:Thank you very much for your careful observation and careful review of the manuscript. We are very sorry that we have neglected some formula conversion links during the derivation of the formula. Equation (11) is the formula for converting theoretical nozzle fluid pressure energy to jet dynamic energy. Parameters such as d1, d2, p1, and p2 are not specific parameters in the pressurized pulsed water jet generator. We have completed the conversion and reference process of the formula, which will be clearer and clearer. Finally, thank you again for your highly serious review of the manuscript and helping us improve the manuscript so that more readers can clearly and quickly understand the derivation process of the formula.
Round 3
Reviewer 1 Report
Comments and Suggestions for AuthorsThe authors have now satisfactorily resolved the matter. I recommend acceptance.
Author Response
Comments1:The authors have now satisfactorily resolved the matter. I recommend acceptance.
Response 1:I am very grateful to the reviewers for their recognition of the research content of our draft. It took many rounds of careful review by the reviewers to enable our drafts to be disclosed to all readers in a better state. I am very grateful to the reviewers and the editorial department staff.
