Research on Influence of Rotation Center Eccentricity on Radial Force of Single-Blade Centrifugal Pump
Round 1
Reviewer 1 Report
Research on Influence of Rotation Center Eccentricity on Ra-2 dial Force of Single-blade Centrifugal Pump
Authors: Chuanlong et al.
The study investigates the effect of the induced eccentricity of a single blade impeller of the centrifugal pump on the radial force variation and potential design point locations to minimize the forces. Due to the inherent imbalance nature of pump design, the study may prove helpful to the designers and pump manufacturers to find a path forward for an optimal eccentricity to minimize the radial force. In this regard, the paper may be useful to the targeted community and can be accepted after the authors include the following comments.
1. Seems you are proposing to create a global eccentricity that will create an eccentric gap between front and back wear ring seals. Could you just shift the center of the core to induce eccentricity while keeping the wear ring center aligned with the diffuser? Please include the geometric model of the single-bladed impeller pump. Please include all the nomenclature and provide the details to incorporate your findings in the actual manufacturing of the pump with an optimal eccentricity. Please explain this in a way to guide the designers and manufacturers to set the method to implement your model in actual manufacturing.
2. Could you please add a discussion about the potential rotodynamic (in)stability this may cause due to the eccentricity?
3. Please keep the consistent orientation of Figure 6 between (a) and (b). Please complete the (b) caption.
4. Could you please plot figure 10 in the frequency domain? It will help to quantify pulsating amplitude with the operational frequency.
Thanks,
Author Response
Thanks for your comments, please read the reply in the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
Reviewer Comments
The followings should be carefully addressed in the revision to be published in Water Journal.
1- The authors should be followed the instruction of the journal in all parts and sections in this manuscript.
2- Complete mathematic calculation model with all nomenclature missing
3- The abstract needs more quantitative results. The abstract section is an important and powerful representation of the research. It is better that the results should be presented with the support of specified data. Please provide your contribution and work novelty.
4- The authors should indicate this technique to enhance system performance. Also, the author should add more references that discuss the effect of using this technique. It is recommended that the authors carry out wide analysis and comparison with the state-of-the-art studies.
5- Most tables and figures are needed improve the quality of all tables and figures.
6- Add references for all equations.
7- I would also expect to validate with two more experimental works available in the literature.
8- The literature review must be improved. Please highlight in the literature review the differences between previous papers and your paper. Please clearly indicate the knowledge gap and prove that it is a really not analyzed area of the field. Please indicate new approach / new methods in a comparison to the existing investigations (literature review should be extended).
9- Description of CFD analysis should be improved. More quantitative information about the grid selection (which method was used, how the mesh was created, how the inflation regions were chosen and designed, etc.), about the accuracy of turbulence models chosen for the given application, about the Y+ values and its meaning for the chosen model etc.
10- You need to add error analysis of your results and add the error bars in your graphs to indicate your accuracy measurements.
11- Improve work justification.
12- More quantitative conclusions should be presented. Please prepare additional comparisons, some percentage differences. There is a lack of quantitative conclusions which should contain main findings from the paper and highlight the new and high novelty and contribution of your work to the field.
13- Present the mathematical equation of the boundary conditions and initial condition.
14- I would also suggest including in the conclusion section but also in several other places in the manuscript discussion and comparison with findings from other authors with similar published research work.
15- It is highly recommendable to add below references in order to underline the connections of the manuscript with the aims and scope of the Journal.
Investigation of effect of pump rotational speed on performance and detection of cavitation within a centrifugal pump using vibration analysis.
Monitoring the performance of centrifugal pump under single-phase and cavitation condition: A CFD analysis of the number of impeller blades.
Investigation of the influence of various numbers of impeller blades on internal flow field analysis and the pressure pulsation of an axial pump based on transient flow behaviour.
Effects of different turbulence models on three-dimensional unsteady cavitating flows in the centrifugal pump and performance prediction.
Detection of cavitation phenomenon within a centrifugal pump based on vibration analysis technique in both time and frequency domains.
Experimental investigation of the effect of suction valve opening on the performance and detection of cavitation in the centrifugal pump based on acoustic analysis technique.
An experimental study on vibration signatures for detecting incipient cavitation in centrifugal pumps based on envelope spectrum analysis.
Numerical Investigations of Transient Flow Characteristic in Axial Flow Pump and Pressure Fluctuation Analysis Based on the CFD Technique..
Numerical investigation of flow field behaviour and pressure fluctuations within an axial flow pump under transient flow pattern based on CFD analysis method.
Experimental investigation of the effect of air injection on performance and detection of cavitation in the centrifugal pump based on vibration technique.
Experimental comparative investigations to evaluate cavitation conditions within a centrifugal pump based on vibration and acoustic analyses techniques.
Influence of guide vanes on the flow fields and performance of axial pump under unsteady flow conditions: Numerical study.
Experimental investigation of cavitation characteristics within a centrifugal pump based on acoustic analysis technique.
Analysis of the Effect of Various Impeller Blade Angles on Characteristic of the Axial Pump with Pressure Fluctuations Based on Time-and Frequency-Domain Investigations.
Numerical Investigation on Effect of Various Pump Rotational Speeds on Performance of Centrifugal Pump Based on CFD Analysis Technique.
16- The conclusion section on lacks in summative conclusions. The main results, novelty and academic contributions should be emphasized in this section. Moreover, are the results obtained in this paper really applicable in other similar researches?
17- In the discussion development, it is very important to emphasize points of agreement or disagreement between results in this work and others cited in references part of manuscript.
18- Authors should discuss limitations of the current study and possible improvements for future directions/research works.
19- Finally, I recommend the author to read through the whole text and correct it to make it more reader-friendly.
Author Response
Thanks for your comments, please read the reply in the annex.
Author Response File: Author Response.docx
Round 2
Reviewer 2 Report
Reviewer Comments
The followings should be carefully addressed in the revision to be published in Water Journal.
1- The abstract still needs more quantitative results. Please provide your contribution and work novelty.
2- Most tables and figures are still needed to improve the quality of all tables and figures.
3- I would also expect to validate with two more experimental works available in the literature.
4- Description of CFD analysis still should be improved. More quantitative information about the grid selection (which method was used, how the mesh was created, how the inflation regions were chosen and designed, etc.), about the accuracy of turbulence models chosen for the given application, about the Y+ values and its meaning for the chosen model etc.
5- You need to add an error analysis of your results and add the error bars in your graphs to indicate your accurate measurements.
6- In the discussion development, it is essential to emphasize points of agreement or disagreement between results in this work and others cited in the references part of the manuscript.
Author Response
Thank you for your comments. Please see the attachment for specific modifications.
Author Response File: Author Response.docx
