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| Study on Piston Ring Lubrication and Oil Film Flow Based on Lattice Boltzmann Method |
| DOI：10.13949/j.cnki.nrjgc.2023.03.002 |
| Key Words:piston ring lattice Boltzmann method hydrodynamic lubrication oil film pressure velocity distribution |
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| Abstract:The lubrication and flow of piston rings were calculated with the incompressible lattice Boltzmann method（LBM）. The piston ring geometric shape and interface velocity boundary were restored with the methods of non-equilibrium extrapolation and spatial interpolation. The feasibility of LBM was verified by Reynolds equation. On this basis， three different piston ring barrel surface profiles were established to study the influence of different piston ring barrel surface profiles on lubrication and flow. The velocity distribution and streamline diagram in the lubrication region were obtained. The results show that under the same conditions， the peak pressure and bearing capacity increase with the increase of barrel surface displacement. In the region of geometric convergence， the proportion of fluid with fast flow velocity in the flow direction of lubricating oil increases gradually. The vortex and reverse velocity components are captured at the piston ring inlet position， and there is a tendency for the vortex zone to expand as the barrel surface offset increases. The results show that it is feasible to apply LBM to calculate piston ring lubrication. |
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