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Entropy production by dissipation effects and characteristic vortex evolution in a rocket turbopump

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Abstract

The relationship between entropy production and vortex evolution affects the efficiency and stability of rotating machinery. This study investigated the energy characteristics of a rocket turbopump and revealed the correlated mechanisms of the entropy production rate using the dissipation effects and characteristic vortex evolution. For the first time, direct and turbulent dissipation and rigid and shear vorticity decomposition methods were utilized to analyze the correlation between flow loss and characteristic vorticities in rotating machinery. With an increase in the flow rate, the hydraulic losses of the dissipation effects and wall decreased by 60% and 38.3%, respectively, and the proportions of the input energy decreased (from 13% to 8%) and remained stable (8%), respectively. The local direct dissipative entropy production (DDEP) in the inducer-impeller is strongly related to shear entropy, and the correlated effect of total enstrophy on DDEP is weaker than that of shear vorticity, indicating that rigid enstrophy suppresses direct dissipation. The correlation between turbulent dissipation and rigid enstrophy was significantly weaker in the static flow passage of the turbopump owing to the weak rigid rotational effect. The correlation between the rigid entropy and local turbulent dissipative entropy production (TDEP) gradually increased with increasing flow rate, reaching a medium correlation (the maximal correlated degree in the turbopump) and exhibiting rigid rotation effects on the hydraulic loss. Moreover, the flow rate significantly affected the correlation (except for the diffuser), and the two characteristic vorticities reached a maximum at the designed flow rate owing to optimal efficiency and minimum hydraulic loss.

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References

  1. Poo M. Mars exploration on the move [J]. National Science Review, 2020, 7(9): 1413.

    Article  Google Scholar 

  2. Xiang L., Tan Y., Chen H. et al. Numerical simulation of cryogenic cavitating flow in LRE oxygen turbopump inducer [J]. Cryogenics, 2022, 126: 103540.

    Article  Google Scholar 

  3. Zhuang S., Bao H., He Z. et al. The Influence of rotating speed on the sealing characteristics of a liquid- sealing impeller for a liquid oxygen turbopump [J]. Processes, 2022, 10(7): 1366.

    Article  Google Scholar 

  4. Whitacker L. H. L., Tomita J. T. et al. Effect of tip clearance on cavitating flow of a hydraulic axial turbine applied in turbopump [J]. International Journal of Mechanical Sciences, 2022, 213: 106855.

    Article  Google Scholar 

  5. Li D., Wang H., Qin Y. et al. Entropy production analysis of hysteresis characteristic of a pump-turbine model [j] Energy Conversion and Management, 2017, 149: 175–191.

    Article  Google Scholar 

  6. Zhang Y., Yang B., Chen H. Study on cavitation characteristics of hydrofoil based on entropy production theory [J]. Journal of Propulsion Technology, 2019, 40(7): 1490–1497(in Chinese).

    Google Scholar 

  7. Kan K., Yang H., Zheng Y. et al. Analysis of hydraulic loss mechanism in inverse S-shaped region of pumpturbine based on entropy generation theory [J]. Journal of Hydraulic Engineering, 2023, 54(3): 1–10(in Chinese).

    Google Scholar 

  8. Wang X., Wang Y., Liu H. et al. A numerical investigation on energy characteristics of centrifugal pump for cavitation flow using entropy production theory [J]. International Journal of Heat and Mass Transfer, 2023, 201: 123591.

    Article  Google Scholar 

  9. Ren Z., Li D., Hao H. et al. Gas-liquid transport behaviors and mass transfer mechanism during oxygen dissolution and evolution processes in a micropump [J]. Journal of Fluids Engineering, 2023, 145(7): 071401.

    Article  Google Scholar 

  10. Kaluri R. S., Basak T. Entropy generation due to natural convection in discretely heated porous square cavities [J]. Energy, 2011, 36(8): 5065–5080.

    Article  Google Scholar 

  11. Han Y., Zhou L., Bai L. et al. Comparison and validation of various turbulence models for U-bend flow with a magnetic resonance velocimetry experiment [J]. Physics of Fluids, 2021, 33(12): 125117.

    Article  Google Scholar 

  12. Ren Z., Hao H., Li D. et al. Dissolution and evolution effects on pressure fluctuations in a space micropump [J]. Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process Mechanical Engineering, 2022, 1871040225.

  13. Yu A., Tang Y., Tang Q. et al. Energy analysis of Francis turbine for various mass flow rate conditions based on entropy production theory [J]. Renewable Energy, 2022, 183: 447–458.

    Article  Google Scholar 

  14. Zhao Y., Li D., Chang H. et al. Suppression effect of bionic guide vanes with different parameters on the hump characteristics of pump-turbines based on entropy production theory [J]. Energy, 2023, 283: 128650.

    Article  Google Scholar 

  15. von Helmholtz H. Über Integrale der hydrodynamischen Gleichungen, welche den Wirbelbewegungen entsprechen [J]. Journal für die reine und angewandte Mathematik, 1858, 25–55.

  16. Robinson S. K. Coherent motions in the turbulent boundary layer [J]. Annual Review of Fluid Mechanics, 1991, 23(1): 601–639.

    Article  Google Scholar 

  17. Hunt J., Wray A., Moin P. Eddies, streams, and convergence zones in turbulent flows [R]. Proceedings of the Summer Program. Center for Turbulence Research Report CTR-S88, 1988, 193–208.

  18. Zhou J., Adrian R. J., Balachandar S. et al. Mechanisms for generating coherent packets of hairpin vortices in channel flow [J]. Journal of Fluid Mechanics, 1999, 387: 353–396.

    Article  MathSciNet  Google Scholar 

  19. Jeong J., Hussain F. On the identification of a vortex [J]. Journal of Fluid Mechanics, 1995, 285: 69–94.

    Article  MathSciNet  Google Scholar 

  20. Chong M. S., Perry A. E., Cantwell B. J. A general classification of three-dimensional flow fields [J]. Physics of Fluids, 1990, 2(5): 765–777.

    Article  MathSciNet  Google Scholar 

  21. Liu C., Yu Y. Mathematical foundation of Liutex theory [J]. Journal of Hydrodynamics, 2023, 34(3): 355–371.

    Article  Google Scholar 

  22. Yu Y., Wang Y. Q., Liu C. A letter for objective Liutex [J]. Journal of Hydrodynamics, 2022, 4(5): 965–969.

    Article  Google Scholar 

  23. Liu C. New ideas on governing equations of fluid dynamics [J]. Journal of Hydrodynamics, 2021, 33(4): 861–866.

    Article  Google Scholar 

  24. Liu C., Yu Y., Gao Y. S. Liutex based new fluid kinematics [J]. Journal of Hydrodynamics, 2022, 34(3): 355–371.

    Article  Google Scholar 

  25. Ren Z., Li D., Qin Y. et al. Correlation between hydraulic loss and characteristic vorticities in a mechanical pump [J] Physics of Fluids, 2023, 35: 065120.

    Article  Google Scholar 

  26. Qin Y., Li D., Wang H. et al. Investigation on hydraulic loss component and distribution in hydraulic machinery: A case study of pump-turbine in pump mode [J]. Journal of Energy Storage, 2022, 52: 104932.

    Article  Google Scholar 

  27. Li D., Ren Z., Li Y. et al. Thermodynamic effects on the cavitation flow of a liquid oxygen turbopump [J]. Cryogenics, 2021, 116: 103302.

    Article  Google Scholar 

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Acknowledgements

This work was supported by the Heilongjiang Postdoctoral Fund (Grant Nos. LBH-Z18071, LBH-TZ2015), the Fundamental Research Funds for the Central Universities (Grant No. HIT.NSRIF. 2019063).

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Authors and Affiliations

  1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    De-you Li, Rui-yi Zhang, Yi Zhang, Zhi-peng Li, Hong-jie Wang & Zhi-peng Ren

  2. School of Astronautics, Harbin Institute of Technology, Harbin, 150001, China

    Jia-qi Zhu

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  1. De-you Li
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  2. Jia-qi Zhu
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  3. Rui-yi Zhang
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  4. Yi Zhang
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  5. Zhi-peng Li
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Correspondence to Hong-jie Wang.

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Conflict of interest: The authors declare that they have no conflict of interest. De-you Li is editorial board member for the Journal of Hydrodynamics and was not involved in the editorial review, or the decision to publish this article. All authors declare that there are no other competing interests.

Ethical approval: This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent: Informed consent was obtained from all individual participants included in the study.

Additional information

Biography: De-you Li (1986-), Male, Ph. D., Professor

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Li, Dy., Zhu, Jq., Zhang, Ry. et al. Entropy production by dissipation effects and characteristic vortex evolution in a rocket turbopump. J Hydrodyn 35, 993–1007 (2023). https://doi.org/10.1007/s42241-023-0073-4

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  • DOI: https://doi.org/10.1007/s42241-023-0073-4

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