Numerical and Experimental Study of a Sector-Shaped Surface Texture in Friction Reduction

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2024-05-03 DOI:10.1007/s11249-024-01863-3

Yuan Wei, Haoming Yan, Shuang Li, Xuewen Wang

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Abstract

Reducing friction using lubricant is of great significance to reducing energy consumption and extending the life of machinery. Surface texturing is effective to enhance the lubrication condition, and it is crucial to properly design the texture’s morphology. In this study, a sector-shaped surface texture is designed and demonstrated using both numerical and experimental methods. A computational fluid dynamic method based on Navier–Stokes equations and a two-phase cavitation model is performed to evaluate the effect of the texture in the hydrodynamic lift and to optimize the geometrical parameters of the texture. The mechanism associated with the additional hydrodynamic pressure generation is also revealed according to the results of the simulation. Then, pin-on-disk rotary friction experiments are performed on steel disks textured by a femtosecond laser to verify the lubricant effect of the proposed texture. The results of the experiment suggest that the sector-shaped textures reduce friction more than conventional circle-shaped textures, which coincides well with the results of the simulation.

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减摩过程中扇形表面纹理的数值和实验研究

使用润滑剂减少摩擦对降低能耗和延长机械寿命具有重要意义。表面纹理可有效改善润滑条件，而正确设计纹理的形态至关重要。本研究采用数值和实验方法设计并演示了扇形表面纹理。基于纳维-斯托克斯方程和两相空化模型的计算流体动力学方法评估了纹理对流体动力升力的影响，并优化了纹理的几何参数。模拟结果还揭示了产生额外流体动力压力的相关机制。然后，在飞秒激光纹理钢盘上进行了针盘旋转摩擦实验，以验证拟议纹理的润滑效果。实验结果表明，扇形纹理比传统的圆形纹理更能减少摩擦，这与模拟结果非常吻合。

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.