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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part J. Journal of engineering tribology >Piston ring performance in two-stroke marine diesel engines: Effect of hydrophobicity and artificial surface texturing on power efficiency
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Piston ring performance in two-stroke marine diesel engines: Effect of hydrophobicity and artificial surface texturing on power efficiency

机译：两冲程船用柴油发动机中的活塞环表现：疏水性和人工表面纹理对功率效率的影响

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摘要

In the present work, an algorithm for the solution of the Reynolds equation incorporating the Elrod-Adams cavitation model and appropriately modified to account for hydrophobic surfaces has been developed and solved by means of the finite difference method. The algorithm has been utilized to calculate the frictional characteristics of piston rings of a large two-stroke marine diesel engine, and to evaluate their performance, in terms of minimum film thickness, friction force, and power loss over a full-engine cycle, including time-dependent phenomena. For improving frictional behavior, two surface treatments of the piston ring surface have been studied, namely hydrophobicity and artificial surface texturing, which are introduced at appropriate parts of the ring face. Following a parametric analysis, optimal texturing and hydrophobicity design parameters have been identified for operation with maximum value of minimum film thickness and minimum friction losses. The present results demonstrate that substantial performance improvement can be achieved if hydrophobicity or artificial surface texturing is properly introduced at the faces of a piston ring.
机译：在本作工作中，通过有限差分法开发并解决了包含ELROD-ADAMS空化模型的雷诺等方程的解决方案的算法，并适当地修改以解释疏水表面。该算法已经利用来计算大型双行程船用柴油发动机的活塞环的摩擦特性，并根据最小膜厚度，摩擦力和全发动机循环的功率损耗来评估它们的性能，包括时间依赖现象。为了提高摩擦行为，已经研究了活塞环表面的两个表面处理，即疏水性和人造表面纹理，其在环面的适当部分引入。在参数分析之后，已经识别出最佳纹理和疏水性设计参数，用于使用最小膜厚度和最小摩擦损失的最大值。本结果表明，如果在活塞环的面上适当地引入疏水性或人造表面纹理，则可以实现显着的性能改善。

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