中南大学学报（自然科学版）2024，Vol.55Issue(5)：1678-1690,13.DOI:10.11817/j.issn.1672-7207.2024.05.002
非对称升力翼对高速列车横风气动性能的影响
Effect of asymmetrical lift airfoils on aerodynamic performance of high-speed train in crosswind
摘要
Abstract
With the continual advancement of high-speed train operating speed,safety concerns related to train operations in crosswind becomes increasingly pronounced.From the perspective of controlling aerodynamic lift,an asymmetric lift airfoil structure was constructed to form an anti-rolling moment.Using numerical simulation methods,the aerodynamic performance of trains in crosswind for the original model,fully deployed lift airfoil model and retracted windward lift airfoil model was compared and analyzed.The influence of different lift airfoils on the aerodynamic performance was analyzed.The results show that the lift airfoil has significant impact on the aerodynamic loads and flow field around high-speed trains.The lift airfoils changes the surface pressure distribution on the roof and the leeward side of the train,and also causes the change in the velocity distribution on the roof,the leeward side of the train and the wake area.Owing to the influence of the lift airfoil,a low-speed and high-pressure area is formed between the lift airfoil and the roof of the train,extends towards the leeward side of the train.Simultaneously,the surface pressure on the leeward side of the train increases.Due to flow separation,the vortex structure on the leeward side of the train changes significantly.Compared with the original train model,the retracted windward lift airfoil models(Model Ⅱ and Model Ⅲ)exhibit a reduction in the side force and the rolling moment of the train.The effect of Model Ⅲ is the most significant,and the side force and rolling moment of the whole train of the 3-car formation are reduced by 13.21％and 11.86％,respectively.关键词
高速列车/升力翼/非对称布置/抗倾覆性能Key words
high-speed train/lift airfoil/asymmetric arrangement/overturning resistance分类
交通工程引用本文复制引用
李志榕,王哲,许澳,张洁..非对称升力翼对高速列车横风气动性能的影响[J].中南大学学报（自然科学版）,2024,55(5):1678-1690,13.基金项目
国家重点研发计划项目(2020YFA0710903)(Project(2020YFA0710903)supported by the National Key Research and Development Program of China) （2020YFA0710903）
