Research on cavitation effect of microtextured array

• Published in: Scientific reports Vol. 12; no. 1; p. 13455
• Main Authors: Jiang, Yuanyuan, Yan, Zhijun, Zhang, Shengwei, Shen, Ziyu, Sun, Haocheng
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 04.08.2022; Nature Publishing Group; Nature Portfolio
• Subjects: 639/166; 639/301; Bubbles; Cavitation; Friction; Humanities and Social Sciences; Mathematical models; multidisciplinary; Oil; Pressure distribution; Science; Science (multidisciplinary); Simulation
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-022-17258-0

In this paper, the surface texture parameters and distribution patterns are studied by numerical simulation and experiment. First, a three-dimensional micro-textured CFD fluid lubrication model with cavitation effect is established, and different texture arrays are designed to study the influence of different distribution modes on bearing capacity, friction coefficient and pressure distribution of the oil film. Then, the simulation results are further analyzed and verified by the visualized plane slider experimental platform, and the formation rules of cavitation bubbles in the micro-textured array, as well as the influences of the surface shape and different distribution modes of the micro-textured array on the cavitation bubbles are discussed. The results show that the existence of cavitation is one of the main reasons for the microtexture to increase the bearing capacity of the oil film, which cannot be ignored in the simulation study. The texture array with single symmetric orientation is the best to improve the oil film bearing capacity, and the bearing performance is the best when the texture inclination angle is 26.6°.The friction coefficient of the asymmetrically oriented textured array is 29.4% lower than that of the non-textured sample.The results in the experiment are consistent with the simulation.