supported by the National Natural Science Foundation of China (No. 52272363);the Key Laboratory of Aerodynamic Noise Control (No. ANCL20200302),Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province。
The technology of pantograph sinking in the cavity is generally adopted in the new generation of high-speed trains in China for aerodynamic noise reduction in this region. This study takes a high-speed train with a 4-...
the National Natural Science Foundation of China(12172308,52072319);the Independent Project of State Key Laboratory of Rail Transit Vehicle System(2023TPL-T06).
A pantograph serves as a vital device for the collection of electricity in trains.However,its aerodynamic resistance can limit the train’s running speed.As installing fairings around the pantograph is known to effect...
supported by National Natural Science Foundation of China(12372049);Science and Technology Program of China National Accreditation Service for Confor-mity Assessment(2022CNAS15);Sichuan Science and Technology Program(2023JDRC0062);Independent Project of State Key Laboratory of Rail Transit Vehicle System(2023TPL-T06).
Reducing the aerodynamic drag and noise levels of high-speed pantographs is important for promoting environmentally friendly,energy efficient and rapid advances in train technology.Using computational fluid dynamics t...
support of RSSB to this work via the project RSSB/COF-UOH-49 is greatly appreciated.The authors also acknowledge the support by FCT,through IDMEC,under LAETA,project UIDB/50022/2020.
Appropriate interaction between pantograph and catenary is imperative for smooth operation of electric trains.Changing heights of overhead lines to accommodate level crossings,overbridges,and tunnels pose significant ...
Aiming to mitigate the aerodynamic lift force imbalance between pantograph strips,which exacerbates wear and affects the current collection performance of the pantograph-catenary system,a study has been conducted to s...
supported by the National Numerical Wind Tunnel Project(Grant No.NNW2018-ZT1A02);the Fundamental Research Funds for the Central Universities of Central South University(Grant No.2019zzts266);the Key R&D Project in Sichuan Province(GrantNo.2019YFG0040).
This study aims to investigate the unsteady aerodynamic performance of a high-speed train’s pantograph with respect to two different dome shapes and without dome under a20°yaw angle using a delayed detached eddy sim...
Pantograph‐catenary arc fault is the primary factor threatening the stability of the power transmission for high‐speed railway.The motion characteristics of the pantograph‐catenary arc under low air pressure and st...
This work is funded by National key R&D Program China(2016YFE0205200);National Natural Foundation of China(U1834201).
In order to understand the mechanism by which a pantograph can generate aerodynamic noise and grasp its farfield characteristics,a simplified double-strip pantograph is analyzed numerically.Firstly,the unsteady flow f...
supported by National Key Research and Development Program of China (No. 2020YFA0710902);National Natural Science Foundation of China (No. 52072319);National Natural Science Foundation of China (Nos. 52072319 and 12172308);State Key Laboratory of Traction Power (2019TPL_T02)。
Aiming at the problem that aerodynamic uplift forces of the pantograph running in the knuckle-downstream and knuckle-upstream conditions are inconsistent,and their magnitudes do not satisfy the corresponding standard,...
supported by the State Key Program of National Natural Science Foundation of China(11931003);the National Natural Science Foundation of China(41974133,11671157)。
In this paper,a Jacobi-collocation spectral method is developed for a Volterraintegro-differential equation with delay,which contains a weakly singular kernel.We use a function transformation and a variable transforma...