| 房金伟,黎苏,刘晓日.基于格子Boltzmann方法的活塞环润滑和油膜流动研究[J].内燃机工程,2023,44(3):10-16. |
| 基于格子Boltzmann方法的活塞环润滑和油膜流动研究 |
| Study on Piston Ring Lubrication and Oil Film Flow Based on Lattice Boltzmann Method |
| DOI：10.13949/j.cnki.nrjgc.2023.03.002 |
| 关键词:活塞环 格子Boltzmann法 流体动力润滑 油膜压力 速度分布 |
| Key Words:piston ring lattice Boltzmann method hydrodynamic lubrication oil film pressure velocity distribution |
| 基金项目:国家自然科学基金项目（52005149）；河北省自然科学基金项目（E2022202026） |
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| 摘要:使用不可压缩格子玻尔兹曼方法（lattice Boltzmann method， LBM）对活塞环进行润滑和流动计算，采用基于非平衡外推和空间插值的方法来重构活塞环几何形状和界面速度边界，通过Reynolds方程验证了LBM的可行性。在此基础上，建立了3种不同的活塞环桶面轮廓，研究了不同活塞环桶面轮廓对润滑和流动的影响，获得了润滑区域的速度分布和流线图。结果表明，在相同条件下，随着桶面偏移量的增加，峰值压力和承载力增加；在几何收敛区域内，润滑油沿流动方向流速快的流体占比逐渐增加；在活塞环入口位置捕捉到了涡流和反向速度分量的存在，随着桶面偏移的增大，涡流区有扩大的趋势。应用LBM计算活塞环润滑是可行的。 |
| 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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