中南大学学报（自然科学版）2024，Vol.55Issue(5)：1806-1821,16.DOI:10.11817/j.issn.1672-7207.2024.05.013
升力翼高速列车前后翼干扰特性研究
Interference characteristics of front and rear wings of high-speed train with lift wing
摘要
Abstract
The installation of the lift wing on the roof of a high-speed train aims to reduce the action force of wheel and rail by increasing the pneumatic lift of the train,which is a new equivalent weight loss method.After the lift wing is mounted on the top of the high-speed train,the working environment is very different from that of aviation,and there is mutual interference between lift wings.The 1:10 ratio of CRH high-speed train model was studied,and the improved delay separation vortex simulation(IDDES)method was used to conduct numerical simulation analysis of the two-wing high-speed train with different wing heights and different wing spacings.The effects of the wing layout on the air dynamics and the surrounding flow field structure around the train were discussed.The results show that for different spacing layout,when the rear wing is too close to the front wing,the flow velocity is increased,the pressure difference becomes smaller,and the aerodynamic lift is reduced.When the rear wing spacing is too large,the rear wing is far away from the interference range of the front wing wake,the rear wing cannot be subjected by the forward airflow under the front wing,so the lift force is reduced.For different height layout,the wake vortex of the front wing with the scattered layout is far away from the rear wing due to the height difference.Compared with the elevation layout,the front wing tail of the scattered layout causes less interference to the rear wing.In terms of aerodynamic force,the overall lift performance of the train with scattered layout is better than that of the equal height layout,and with the front low and rear high type layout,the increase effect of the train is the best.Based on the results of different spacings and different height layout,it is finally determined that for the two-wing high-speed trains,the aerodynamic performance of the whole vehicle with the front low and rear high layout with the wing spacing of 0.90H is optimal,especially the lift of the train can be significantly improved.关键词
高速列车/升力翼/翼间干扰特性/计算流体力学Key words
high-speed train/lift wing/inter wing interference characteristics/computational fluid dynamics分类
交通工程引用本文复制引用
张宝珍,熊小慧,汪欣然,耿嘉旭..升力翼高速列车前后翼干扰特性研究[J].中南大学学报（自然科学版）,2024,55(5):1806-1821,16.基金项目
国家重点研发计划项目(2020YFA0710903)(Project(2020YFA0710903)supported by the National Key R&D Program of China) （2020YFA0710903）
