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Numerical analysis on cavitation of LNG in micro clearance of self-lubricated journal bearing.

Number: pap. n. 1577

Author(s) : WANG Y., HOU Y., GUO Y., et al.

Summary

In the Liquefied Natural Gas (LNG) transportation and storage, pump is required to transport the processed fluid. In order to meet the requirements of hydraulic head, tightness and purity, a high speed full-cryogenic turbo pump using LNG as self-lubricant is under development. To reach the high pump head, the centrifugal LNG pump must be working at high rotational speed. In micro bearing clearance lubricated with near-saturated LNG, sub-ambient pressure will be generated due to the hydrodynamic effect, hence, cavitation is most likely to occur during operation. In order to mitigate cavitation, cavitation-flow with high shear rates in micro bearing clearance is focused on. Numerical analysis of LNG lubricated herringbone bearings is carried out and the bearing characteristics are analysed. Furthermore, liquid nitrogen(LN2) is used for similarity experiment to verify the the simulation and the feasibility of structural optimization.

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Pages: 8

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Details

  • Original title: Numerical analysis on cavitation of LNG in micro clearance of self-lubricated journal bearing.
  • Record ID : 30025949
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1577

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