Influencing Factor of Hydrodynamic Pressure on Tire in Wet Weather Based on Fluent

Abstract

Hydrodynamic pressure is the major cause of vehicle hydroplaning in wet weather. By establishing a finite element model of the tire with longitudinal and transverse pattern, hydrodynamic pressure of the tire under different driving conditions and distributing pattern of water velocity in different parts of the tire were obtained through Fluent. The relations of hydrodynamic pressure with vehicle velocity, water film thickness, and tire pattern depth were gained based on data regression. The results show that (1) hydrodynamic pressure of the tire depends on water film thickness, tread pattern depth, and vehicle speed; (2) as water film thickness increases, the relation between hydrodynamic pressure and vehicle speed gradually shifts from non-linear to linear; and (3) influence of vehicle speed on hydrodynamic pressure is the most obvious, and changing the tread pattern depth alone cannot completely avoid hydroplaning.