Effects of medium fluid cavitation on fluctuation characteristics of magnetic fluid seal interface in agricultural centrifugal pump
Keywords:
centrifugal pump, magnetic liquid sealing device, medium cavitation, interface fluctuationsAbstract
The fluctuation law of magnetic fluid seal interface of an agricultural centrifugal pump is theoretically unknown; the pressure and velocity fluctuations are crucial factors that cause interface fluctuation. In this study, the pressure and velocity fluctuations of the sealing interface on an agricultural centrifugal pump during cavitation were investigated based on the methods of Ansys CFX numerical calculation and experimental verification. The results demonstrated that at the same flow rate, the pressure fluctuation amplitude of the sealing interface decreased gradually from the shaft surface to the bottom of the polar tooth. At different flow rates, the amplitude of the pressure fluctuation decreased with an increase in the flow rate. The cavitation of the medium aggravated the impact and water hammer of the liquid, leading to the occurrence of the jitter phenomenon in the sealing interface to accelerate the fluctuation frequency of the axial velocity of the sealing liquid, which accelerated the emulsification of the magnetic fluid. This law can provide a reference for the design of magnetic fluid sealing devices for agricultural centrifugal pumps. Keywords: centrifugal pump, magnetic liquid sealing device, medium cavitation, interface fluctuations DOI: 10.25165/j.ijabe.20211406.6718 Citation: Li Z G, Li W X, Wang Q F, Xiang R, Cheng J, Han W, et al. Effects of medium fluid cavitation on fluctuation characteristics of magnetic fluid seal interface in agricultural centrifugal pump. Int J Agric & Biol Eng, 2021; 14(6): 85–92.References
[1] Bao M X, Ni X D, Kang S W. Efficiency analysis of pump-controlled motor system of hydraulic machinery continuously variable transmission for agricultural machinery. InMATEC Web of Conferences, 2020; 319: 03002.
[2] van der Wal K, van Ostayen RA, Lampaert S G. Ferrofluid rotary seal with replenishment system for sealing liquids. Tribol Int. 2020; 150: 106372.
[3] Biao X, Yiping L, Hongjuan R. Review on magneto-rheological fluid and its application. Am J Nanosci Nanotechnol, 2014; 2: 70–74.
[4] Parmar S, Upadhyay RV, Parekh K. Optimization of design parameters affecting the performance of a magnetic fluid rotary seal. Arab J Sci Eng. 2021; 46(3): 2343–2348.
[5] Szczęch M. Magnetic fluid seal critical pressure calculation based on numerical simulations. Simulation, 2020; 96(4): 403–413.
[6] Parmar S, Ramani V, Upadhyay R V, Parekh K. Two stage magnetic fluid vacuum seal for variable radial clearance. Vacuum, 2020; 172: 109087.
[7] He X Z, Miao Y B, Wang L, Li D C. Latest development in sealing of liquid medium with magnetic fluid. China J Vac Sci Technol, 2019; 39(5): 361–366.
[8] Liu T, Cheng Y, Yang Z. Design optimization of seal structure for sealing liquid by magnetic fluids. J Magn Mater, 2005; 289: 411–414.
[9] Qian J G, Yang Z Y. Analysis of liquid-liquid interface stability for magnetic liquid dynamic seal. Fluid Machinery, 2008; 36(12): 21–23, 20. (in Chinese)
[10] Szczęch M. Influence of selected parameters on the reseal instability mechanism in magnetic fluid seals. J Magn, 2019; 24(1): 32–38.
[11] Wang H J. Novel shield between magnetic fluid and sealed liquid: A theoretical and experimental study. Chinese J Vac Sci Technol, 2019; 39(4): 284–287. (in Chinese)
[12] Krakov M S, Zakinyan A R, Zakinyan A A. Instability of the miscible magnetic/non-magnetic fluid interface. J Fluid Mech, 2021; 913(A30): 1–29.
[13] Qian J G, Yang Z Y. Characteristics of a magnetic fluid seal and its motion in an axial variable seal gap. J China Univ Min Technol, 2008; 18(4): 634–636. (in Chinese)
[14] Yang X L, Sun P, Hao F X. Magnetic field finite element analysis of diverging stepped ferrofluid seal with a large gap and two magnetic sources. Int J Appl Electrom, 2020; 63(1): 31–44.
[15] Merklein M, Rösel S. Characterization of a magnetorheological fluid with respect to its suitability for hydroforming. Int J Mater Form, 2010; 3(1): 283–286.
[16] Chalghoum I, Kanfoudi H, Elaoud S, Akrout M, Zgolli R. Numerical modeling of the flow inside a centrifugal pump: Influence of impeller–volute interaction on velocity and pressure fields. Arab J Sci Eng, 2016; 41(11): 4463–4476.
[17] Rakibuzzaman M, Kim K, Suh SH. Numerical and experimental investigation of cavitation flows in a multistage centrifugal pump. J Mech Sci Technol, 2018; 32(3): 1071–1078.
[18] Ye Y H, Zhu X Y, Lai F, Li G J. Application of the semi-analytical cavitation model to flows in a centrifugal pump. Int Commun Heat Mass, 2017; 86: 92–100.
[19] Versteeg H K, Malalasekera W. An introduction to computational fluid dynamics: The finite volume method. Pearson Education, 2007.
[20] Yakhot V, Orszag S A. Renormalization group analysis of turbulence. I. Basic theory. J Sci Comput, 1986; 1(1): 3–51.
[21] Brennen C E. Cavitation and bubble dynamics. Oxford: Oxford University Press; 1995.
[22] Hu B, Zhang Q, Sun Z. Influence of relative position of diffuser leading edge on pressure pulsation in mixed-flow pump. J Irrig Drain Eng, 2021; 39(1): 16–22.
[23] Zhang C, You J, Tai R, Wang X, Liu Y, Cheng Y. CFD simulations of pump-trip runaway process pressure pulsation of a model pump-turbine. J Hydraul Eng, 2020; 39(4): 62–72.
[24] Wang T, Kong F Y, Xia B, Bai Y X, Wang C. The method for determining blade inlet angle of special impeller using in turbine mode of centrifugal pump as turbine. Renew Energy, 2017; 109: 518–528.
[2] van der Wal K, van Ostayen RA, Lampaert S G. Ferrofluid rotary seal with replenishment system for sealing liquids. Tribol Int. 2020; 150: 106372.
[3] Biao X, Yiping L, Hongjuan R. Review on magneto-rheological fluid and its application. Am J Nanosci Nanotechnol, 2014; 2: 70–74.
[4] Parmar S, Upadhyay RV, Parekh K. Optimization of design parameters affecting the performance of a magnetic fluid rotary seal. Arab J Sci Eng. 2021; 46(3): 2343–2348.
[5] Szczęch M. Magnetic fluid seal critical pressure calculation based on numerical simulations. Simulation, 2020; 96(4): 403–413.
[6] Parmar S, Ramani V, Upadhyay R V, Parekh K. Two stage magnetic fluid vacuum seal for variable radial clearance. Vacuum, 2020; 172: 109087.
[7] He X Z, Miao Y B, Wang L, Li D C. Latest development in sealing of liquid medium with magnetic fluid. China J Vac Sci Technol, 2019; 39(5): 361–366.
[8] Liu T, Cheng Y, Yang Z. Design optimization of seal structure for sealing liquid by magnetic fluids. J Magn Mater, 2005; 289: 411–414.
[9] Qian J G, Yang Z Y. Analysis of liquid-liquid interface stability for magnetic liquid dynamic seal. Fluid Machinery, 2008; 36(12): 21–23, 20. (in Chinese)
[10] Szczęch M. Influence of selected parameters on the reseal instability mechanism in magnetic fluid seals. J Magn, 2019; 24(1): 32–38.
[11] Wang H J. Novel shield between magnetic fluid and sealed liquid: A theoretical and experimental study. Chinese J Vac Sci Technol, 2019; 39(4): 284–287. (in Chinese)
[12] Krakov M S, Zakinyan A R, Zakinyan A A. Instability of the miscible magnetic/non-magnetic fluid interface. J Fluid Mech, 2021; 913(A30): 1–29.
[13] Qian J G, Yang Z Y. Characteristics of a magnetic fluid seal and its motion in an axial variable seal gap. J China Univ Min Technol, 2008; 18(4): 634–636. (in Chinese)
[14] Yang X L, Sun P, Hao F X. Magnetic field finite element analysis of diverging stepped ferrofluid seal with a large gap and two magnetic sources. Int J Appl Electrom, 2020; 63(1): 31–44.
[15] Merklein M, Rösel S. Characterization of a magnetorheological fluid with respect to its suitability for hydroforming. Int J Mater Form, 2010; 3(1): 283–286.
[16] Chalghoum I, Kanfoudi H, Elaoud S, Akrout M, Zgolli R. Numerical modeling of the flow inside a centrifugal pump: Influence of impeller–volute interaction on velocity and pressure fields. Arab J Sci Eng, 2016; 41(11): 4463–4476.
[17] Rakibuzzaman M, Kim K, Suh SH. Numerical and experimental investigation of cavitation flows in a multistage centrifugal pump. J Mech Sci Technol, 2018; 32(3): 1071–1078.
[18] Ye Y H, Zhu X Y, Lai F, Li G J. Application of the semi-analytical cavitation model to flows in a centrifugal pump. Int Commun Heat Mass, 2017; 86: 92–100.
[19] Versteeg H K, Malalasekera W. An introduction to computational fluid dynamics: The finite volume method. Pearson Education, 2007.
[20] Yakhot V, Orszag S A. Renormalization group analysis of turbulence. I. Basic theory. J Sci Comput, 1986; 1(1): 3–51.
[21] Brennen C E. Cavitation and bubble dynamics. Oxford: Oxford University Press; 1995.
[22] Hu B, Zhang Q, Sun Z. Influence of relative position of diffuser leading edge on pressure pulsation in mixed-flow pump. J Irrig Drain Eng, 2021; 39(1): 16–22.
[23] Zhang C, You J, Tai R, Wang X, Liu Y, Cheng Y. CFD simulations of pump-trip runaway process pressure pulsation of a model pump-turbine. J Hydraul Eng, 2020; 39(4): 62–72.
[24] Wang T, Kong F Y, Xia B, Bai Y X, Wang C. The method for determining blade inlet angle of special impeller using in turbine mode of centrifugal pump as turbine. Renew Energy, 2017; 109: 518–528.
Downloads
Published
2021-12-16
How to Cite
Li, Z., Li, W., Wang, Q., Xiang, R., Cheng, J., Han, W., & Yan, Z. (2021). Effects of medium fluid cavitation on fluctuation characteristics of magnetic fluid seal interface in agricultural centrifugal pump. International Journal of Agricultural and Biological Engineering, 14(6), 85–92. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6718
Issue
Section
Power and Machinery Systems
License
IJABE is an international peer reviewed open access journal, adopting Creative Commons Copyright Notices as follows.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
