• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering analysis with boundary elements >A study on the oil transport in piston skirt-cylinder liner under fully flooded conditions using improved SPH simulations
【24h】

A study on the oil transport in piston skirt-cylinder liner under fully flooded conditions using improved SPH simulations

机译：利用改进的SPH模拟研究全裙带条件下活塞裙缸套中的油传输

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the present work, we studied the mechanical friction losses of the piston assembly-cylinder system that can be reduced by the fully flooded hydrodynamics lubrication during the oil film developed between the piston skirt and the cylinder liner. The lubricating oil transport process was described with Navier-Stokes equations in the clearance of piston skirt and liner with the piston reciprocating motion based on fully flooded hydrodynamics lubrication. The improved SPH method was then used to study such oil transport process with the piston reciprocating motion for the first time. The effects of the viscosity of lubricating oil, inertia force of oil film, the velocity of piston reciprocating motion, oil film thickness on oil transport were studied systematically. It was found that the inertia force of oil film plays a very important role in oil transport process under the condition of large clearances between the piston skirt and cylinder liner, small kinematic viscosities (i.e. large Reynolds numbers), and/or large frequencies of velocity evolution (i.e. large velocity gradient of piston reciprocating motion). Specifically, the results demonstrate that the internal friction effect of the fluid becomes prominent on maintaining the stability of lubricating oil transport process. It is also found that influence of the velocity of piston reciprocating motion on oil flow stable is not obvious. We expect that the study presented here can provide a useful guidance for the design of low-mechanical friction losses internal combustion engines.
机译：在当前的工作中，我们研究了活塞总成-气缸系统的机械摩擦损耗，该损耗可以通过在活塞裙和气缸套之间形成的油膜期间完全注满的流体动力润滑来减少。利用Navier-Stokes方程描述了在完全基于流体动力学润滑的情况下活塞裙边和衬套的间隙以及活塞往复运动的情况下的润滑油运输过程。然后，改进的SPH方法首次用于研究活塞往复运动时的这种油传输过程。系统研究了润滑油的粘度，油膜的惯性力，活塞的往复运动速度，油膜的厚度对油的输送的影响。发现在活塞裙和气缸套之间的间隙大，运动粘度小（即大雷诺数）和/或大的速度频率的情况下，油膜的惯性力在输油过程中起着非常重要的作用。演变（即活塞往复运动的大速度梯度）。具体而言，结果表明，在保持润滑油输送过程的稳定性时，流体的内部摩擦作用变得显着。还发现，活塞往复运动速度对油流稳定性的影响并不明显。我们希望这里介绍的研究可以为设计低机械摩擦损失的内燃机提供有用的指导。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号