ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (7): 220798-220798.

• Solid Mechanics and Vehicle Conceptual Design •

### Comparasion of prediction methods for critical hydroplaning speed of aircraft tire on wet pavement

CAI Jing, LI Yue, ZONG Yiming

1. College of Airport Engineering, Civil Aviation University of China, Tianjin 300300, China
• Received:2016-09-19 Revised:2016-12-14 Online:2017-07-15 Published:2017-04-05
• Supported by:

National Natural Science Foundation of China (51508559);Science and Technology Support Major Project of Tianjin (14ZCZDGX00001);the Fundamental Research Funds for the Central Universities (3122014C013);Open Foundation of Provincial Scientific Research Institutions of CAUC (KFJJ2014JCGC07)*Corresponding author.E-mail:leoliyue@163.com

Abstract:

On the basis of National Aeronautics and Space Administration (NASA) critical hydroplaning speed calculational equation, a numerical analysis model for the rolling tire in place under the impact of flowing water film (water flow model) is established based on coupled Eulerian Lagrangia (CEL) algorithm. According to NASA experimental investigations and experimental equation, the validity of the water flow model is examined. The serviceability of the NASA equation under heavy axle load and high inflation pressure is confirmed. Another numerical analysis model for the static water film under the impact of rolling tire (tire rolling model) is established considering the water film status on the pavement. The effect of water film status on hydroplaning speed is discussed based on the model. A comparison of the above two models shows that the mechanisms of the interaction between the rolling tire and the water film are different in the two models, and with the same velocity and inflation pressure, the maximum value of the hydrodynamic pressure on positive side of tire in the tire rolling model is greater than that of the water flow model. This means that the tire in the model for the static water film under the impact of the rolling tire would be lifted to a higher significant level than that of the other model. With the same velocity, the pavement vertical support force and the hydroplaning speed in the tire rolling model are less than that of the water flow model. This means the results of the tire rolling model are more appropriate for the analysis of water film-tire interaction during high speed taxing of the aircraft. According to above results,a correction equation for hydroplaning speed is proposed considering the water status on pavement.

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