湿滑道面飞机轮胎临界滑水速度计算方法比较  

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

作　　者：蔡靖[1] 李岳[1] 宗一鸣 

机构地区：[1]中国民航大学机场学院,天津300300

出　　处：《航空学报》2017年第7期236-247,共12页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(51508559);天津市科技支撑计划重点项目(14ZCZDGX00001);中央高校基本科研业务费专项资金(3122014C013);中国民航大学省部级科研机构开放基金(KFJJ2014JCGC07)~~

摘　　要：以美国国家航空航天局(NASA)临界滑水速度计算公式为基础,基于耦合欧拉-拉格朗日(CEL)算法建立动流场冲击原地转动轮胎分析模型,并由NASA公式及试验数据验证了模型的正确性及NASA公式在重轴载高胎压范围的适用性。进而考虑实际道面积水状态,建立滚动轮胎冲击静流场模型,探讨实际积水状态对临界滑水速度的影响。通过两类模型对比分析得出:两类模型的轮胎-水膜相互作用机理不同,相同速度和胎压下,后者在轮胎前缘形成的动水压强峰值明显高于前者,表明滚动轮胎冲击静流场模型中轮胎受到动水压强抬升作用更为显著,且相同速度条件下,滚动轮胎冲击静流场分析模型计算的竖向支撑力和临界滑水速度始终低于动流场冲击滚动轮胎的结果,表明该模型计算结果偏于安全,更适用于飞机高速滑行中轮胎-水膜相互作用分析。据此,提出了基于道面积水状态的临界滑水速度计算公式。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.

关 键 词：临界滑水速度 动流场冲击滚动轮胎 滚动轮胎冲击静流场 耦合欧拉-拉格朗日(CEL) 竖向支撑力 

分 类 号：V351.11[航空宇航科学与技术—人机与环境工程]