织构内外正弦波粗糙度对动压润滑性能的影响

Influence of Sinusoidal Roughness Inside and outside Texture on Hydrodynamic Lubrication Performance of Textured Surface

建立含不同位置及不同分布的正弦波粗糙度织构化动压润滑理论模型,数值仿真研究正弦波粗糙度在织构化摩擦副表面的分布位置及分布夹角对织构动压润滑性能的影响规律及差异。数值计算结果表明,正弦波粗糙度位于织构之外时,垂直速度分布优于平行速度分布,而粗糙度位于织构内部时则刚好相反;此外,粗糙度幅值和波长对动压润滑性能的影响与粗糙度的位置及分布方式有关,仅当粗糙度位于织构之外且垂直速度分布时,随粗糙度幅值和波长的增加,动压润滑性能有明显的提升。

The hydrodynamic lubrication theoretical model of textured surface containing sinusoidal roughness with different positions and distributions was established,and the influence of sinusoidal roughness with different position and distributions on hydrodynamic lubrication performance of textured surface was studied by numerical simulation.The numerical results show that the vertical velocity distribution is superior to the parallel velocity distribution when the sinusoidal roughness is outside the texture,while the opposite is true when the sinusoidal roughness is inside the texture.In addition,the influence of roughness amplitude and wavelength on hydrodynamic lubrication performance is related to the location and distribution of roughness.Only when the roughness is outside the texture and perpendicular to the velocity,the hydrodynamic lubrication performance increases significantly with the increase of roughness amplitude and wavelength.