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RESEARCHES ON LEAKAGE WITH LUBRICATING OIL USING A COMPOSITE MULTI-PHASE LATTICE BOLTZMANN METHOD

ABSTRACT
In this paper, a novel model to investigate leakage of gaseous working fluid in pressured devices with lubricating oil was created with lattice Boltzmann method and Shan-Chen multi-phase model. A method to adapt actual pressure-density relation into the lattice via a self-adapting timestep and simplify the simulation of compressible fluid was developed. A model to simulate two-phased leakage with lubricating oil was created with a combination of Shan-Chen model and passive scalar model. The model can realize the phase distribution simulation in the leakage field without causing the pressure and the inter-phase interactions to overlap. This model is also able to be combined with other multi-phase models. After a group of preliminary tests of the model, the characteristics of phase distribution and leakage were investigated qualitatively. Five types of phase distribution in the simulation results were classified, which are: uniformed distribution, sphered drips, gas channel, blocked channel, and slug bubbles. The results of simulations show good conformance with actual leakage patterns. Preliminary discussions about the leakage features are made upon the results. However, these simulation results are only qualitative and cannot show the quantitative features in leakages. More experimental investigations should be carried out to realize correlations to the model.
KEYWORDS
PAPER SUBMITTED: 2020-06-05
PAPER REVISED: 2020-11-13
PAPER ACCEPTED: 2021-02-04
PUBLISHED ONLINE: 2021-04-10
DOI REFERENCE: https://doi.org/10.2298/TSCI200605135L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 1, PAGES [221 - 231]
REFERENCES
  1. S. P. Dudić et al, Leakage quantification of compressed air on pipes using thermovision. Thermal science, 16 (suppl. 2) (2012), 555-565.
  2. X. Peng et al, Research and development status of CO2 refrigeration compressors and expanders, The 4th National Refrigeration and Air Conditioning New Technology Seminar, 2006.
  3. Y. Li, Thermal process analysis and experimental study of scroll expander. Cryogenics, (4) (2000) 23-28.
  4. F. Sun et al, The effect of lubricant on system of carbon dioxide transcritical cycle with expander, Journal of Engineering Thermophysics, 28 (03) (2016) 369-372.
  5. H. Wang, Theoretical analysis and experimental research of scroll expander. Diss. Zhejiang University. 1999.
  6. M. Zhang., Simulation calculation and experimental study of CO2 double cylinder rolling piston expander. Diss. Tianjin University. 2012.
  7. S. Liu et al, Theoretical and experimental study on leakage in CO2 rotary expander. Journal of Tianjin University, 41 (12) (2008) 1417-1421.
  8. A. A. Mohamad, Lattice Boltzmann Method Fundamentals and Engineering Applications with Computer Codes, 2nd edition, Springer, London 2019.
  9. Y. He et al, Lattice Boltzmann Method: Theory and Applications, Science Press, Beijing, 2009.
  10. A. Randles, E. Kaxiras, Parallel in time approximation of the lattice Boltzmann method for laminar flows, Journal of Computational Physics, 270 (2014) 577-586.
  11. X. Tang et al, Researches on two-phase flows around a hydrofoil using Shan-Chen multi-phase LBM model, Journal of Mechanical Science and Technology, 30 (2) (2016) 575-584.
  12. Q. Li, K. H. Luo, Achieving tunable surface tension in the pseudopotential lattice Boltzmann modeling of multiphase flows, Physical Review E, 88 (2013) 0533071-05330710.
  13. X. Shan, Simulation of Reyleigh-Bernard convection using a lattice Boltzmann method. Physical Review E, 55 (1997), 2780-2788.
  14. A. Kuzmin, A. A. Mohamad, Multirange multi-relaxation time Shan-Chen model with extended equilibrium, Computers and Mathematics with Applications, 59 (2010) 2260-2270.
  15. R. Moissis, P. Griffith, Entrance Effects in a Two-Phase Slug Flow. Journal of Heat Transfer, 84 (1) (1962) 29.
  16. S. P. Sutera, R. Skalak, The history of Poiseuille's law. Annual review of fluid mechanics, 25(1) (1993), 1-20.

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence