TY - JOUR

T1 - A Comprehensive Numerical Study of a Wedge-Shaped Textured Convergent Oil Film Gap

AU - Scharf, Raphael

AU - Maier, Michael

AU - Pusterhofer, Michael

AU - Grün, Florian

PY - 2024/4/5

Y1 - 2024/4/5

N2 - 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.

AB - 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.

UR - https://pureadmin.unileoben.ac.at/portal/en/publications/a-comprehensive-numerical-study-of-a-wedgeshaped-textured-convergent-oil-film-gap(d7f27a57-90e8-4b46-9160-01f97a6a224e).html

U2 - 10.3390/lubricants12040121

DO - 10.3390/lubricants12040121

M3 - Article

VL - 12.2024

JO - Lubricants

JF - Lubricants

SN - 2075-4442

IS - 4

M1 - 121

ER -