A Numerical Investigation of the Effects of Groove Texture on the Dynamics of a Water-Lubricated Bearing–Rotor System

This paper aims to investigate the combined effects of working condition and structural parameters groove texture on dynamic characteristics, stability unbalance response a water-lubricated hydrodynamic bearing–rotor system avoid instability excessive vibration rotor. The Navier–Stokes equation, standard K-? model with enhanced wall treatment Zwart–Gerber–Belamri cavitation are considered using commercial software Fluent calculate stiffness damping coefficients groove-textured, bearing based mesh method; critical mass express solved by fourth order Runge–Kutta method rotor calculated equations. results indicate that shallower longer textures can improve direct along load direction kyy, weaken in orthogonal kxx, decrease amplitude at greater rotational speed smaller eccentricity ratio; however, impact grooves is not as great it stiffness—there exists an optimum width achieve best performance.