Analysis on the Hydroplaning of Aircraft Tire Under Real Texture Pavement Conditions

In the aviation industry, aircraft safety is mainly focused on the landing stage. Furthermore, wet road conditions are the main cause of accidents during landing. To accurately reflect the hydroplaning of an aircraft tire, it is necessary to develop a hydroplaning model under real texture pavement conditions. In the present study, based on real textures, a friction model was calculated to obtain a more realistic simulation of the tire. Furthermore, a fluid-solid coupling model among the tire, water film, and real texture pavement was established based on the Coupled Eulerian-Lagrangian (CEL) algorithm. The characteristic indexes, such as friction coefficient and hydrodynamic pressure, were extracted to express the relationship among influencing factors, including velocity, slip ratio, water film thickness, and pavement type were used to analyze the skiing behavior of aircraft tires under wet conditions. Hence, this provided a reference for aircraft landing safety. The results indicates that the hydrodynamic pressure gradually decreases and the support of the pavement gradually increases during the landing stage of A320. The most dangerous moment occurs at the beginning of the landing. The high velocity at the beginning of the landing of the aircraft results in a higher hydrodynamic pressure. The increase in the slip ratio causes the hydrodynamic pressure to decrease first and then increase. When the slip ratio is 0. 15, the hydrodynamic pressure of the pavement reaches a minimum. When the water film is thin (3 mm), no drifting occurs. However, when the water film is excessively thick (10 mm), drifting can occur. The hydrodynamic pressure is significantly dependent on the velocity and slip ratio under critical wet conditions (7 mm). The results of the simulation under dry conditions indicates that the anti-sliding performance of each pavement type is Stone Matrix Asphalt >Open Graded Friction Course> Asphalt Course>Flat pavement. Thus, controlling the appropriate initial velocity and slip ratio is the most important guarantee for improving the safety of aircraft landing. © 2020, Editorial Department of China Journal of Highway and Transport. All right reserved.