A Comprehensive Numerical Study of a Wedge-Shaped Textured Convergent Oil Film Gap

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-04-05 DOI:10.3390/lubricants12040121

Raphael Scharf, Mitchell Maier, M. Pusterhofer, Florian Grün

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引用次数: 0

Abstract

The modification of surface geometries to reduce friction is an omnipresent topic of research. In nature, different low-friction surfaces, such as fish skins, exist. To transfer this knowledge to technical applications, for example, to journal or plain bearings, many numerical and experimental studies of textured surfaces have been performed. In this work, the influence of the geometric parameters (texture length , width , angle and start position of a wedge-shaped texture on three different convergent oil film gaps was analyzed in full-film lubrication and compared with untextured oil film gaps. With the aid of a CFD (computational fluid dynamics) model, a comprehensive variation study was conducted, and the best-performing wedge-shaped texture was determined. The results show that an open texture at the inlet provides the largest improvement. Furthermore, it can be observed that the optimal relative texture width and absolute inlet height for the three investigated oil film gaps are similar. In contrast to the volume flow of the untextured geometry, the volume flow of the textured one is significantly higher, especially that perpendicular to the movement direction.

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楔形纹理收敛油膜间隙的综合数值研究

改变表面几何形状以减少摩擦是一个无处不在的研究课题。自然界中存在各种不同的低摩擦表面，例如鱼皮。为了将这些知识应用到技术领域，例如轴颈或滑动轴承，人们对纹理表面进行了大量的数值和实验研究。在这项工作中，分析了全膜润滑中几何参数（楔形纹理的长度、宽度、角度和起始位置）对三种不同会聚油膜间隙的影响，并与无纹理油膜间隙进行了比较。借助 CFD（计算流体动力学）模型，进行了全面的变化研究，并确定了性能最佳的楔形纹理。结果表明，入口处的开放式纹理改善效果最大。此外，我们还发现，在所研究的三种油膜间隙中，最佳的相对纹理宽度和绝对入口高度是相似的。与无纹理几何体的体积流量相比，有纹理几何体的体积流量明显更高，尤其是垂直于运动方向的体积流量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico