Results 31 to 40 of about 4,525 (199)

A local projection stabilization finite element method with nonlinear crosswind diffusion for convection-diffusion-reaction equations [PDF]

, 2013
An extension of the local projection stabilization (LPS) finite element method for convection-diffusion-reaction equations is presented and analyzed, both in the steadystate and the transient setting.
Volker, John, Barrenechea, Gabriel, Knobloch, Petr   +2 more
core   +2 more sources

Aerodynamic performance of traveling road vehicles on a single-level rail-cum-road bridge under crosswind and aerodynamic impact of traveling trains

Engineering Applications of Computational Fluid Mechanics, 2022
Crosswind and train-induced wind are major factors influencing the aerodynamic performance of vehicles on single-level rail-cum-road bridges. Based on computational fluid dynamics (CFD) technology, this work developed a numerical model to discuss ...
Jiajun He, Huoyue Xiang, Yongle Li, Bing Han   +3 more
doaj   +1 more source

A trajectory-tracking controller for improving the safety and stability of four-wheel steering autonomous vehicles

Transport, 2021
To achieve anti-crosswind, anti-sideslip, and anti-rollover in trajectory-tracking for Four-Wheel Steering (4WS) autonomous vehicles, a trajectory-tracking controller based on a four-channel Active Disturbance Rejection Control (ADRC) was used to track ...
Runqiao Liu, Minxiang Wei, Nan Sang, Jianwei Wei   +3 more
doaj   +1 more source

Numerical simulation study on crosswind sensitivity of a sedan

Kongqi donglixue xuebao
Strong crosswinds pose a severe threat to the safety of vehicles driving at high speeds. In this study, the crosswind sensitivity of a three-box sedan is investigated using a coupled aerodynamics-multibody dynamics simulation approach, with the vehicle’s
Yansi Ding, Wei Yi, Yu Tian, Binxu Wang, Wenjiang Wang, Qiuli Luo, Fengli Zhang   +6 more
doaj   +1 more source

Research on the Uplift Characteristics of Pantographs of High-Speed Trains Under Crosswind Conditions

Applied Sciences
Through the geometric relationships and force analysis of the main components of pantographs on high-speed trains, the coefficients of aerodynamic forces and lift transmission between the pantograph and main components under crosswind conditions were ...
Meng Zhao, Yaning Duan, Xingbo Lan, Zile Jia   +3 more
doaj   +1 more source

Finalisation of the European Approach to Assess the Fire Performance of Facades—Brief Information on the Outcome of the Project

Fire and Materials, EarlyView.
ABSTRACT This research was conducted within the framework of project SI2.825082, funded by the European Commission—DG GROW. The project's objective was to finalise a European approach for assessing the fire performance of façades under medium and large fire exposure conditions.
Péter Tóth, Anja Hofmann‐Böllinghaus, Fabien Dumont, Johan Anderson, Johan Sjöström, Mikael Bergius, Roman Chiva, Octavian Lalu   +7 more
wiley   +1 more source

A Numerical Study on the Improving Techniques of the Cooling Performance of a Natural Draft Dry Cooling Tower under Crosswind

Chemical Engineering Transactions, 2015
Crosswind degrades the cooling performance of a natural draft dry cooling tower (NDDCT) by affecting the air flow field at the inlet of the heat exchanger bundle, incurring complex vortexes inside the tower shell, and shifting the flow direction at the ...
W. Wang, P. Liu, Z. Li, W. Ni, J. Liu, Y. Li   +5 more
doaj   +1 more source

Aerodynamics of a short intake in crosswind

Aerospace Science and Technology, 2022
The next generation of turbofan aero-engines are likely to have an increase in fan diameter to reduce the specific thrust and increase the overall propulsive efficiency. More compact nacelles with possibly shorter intakes may be used to reduce weight and drag and achieve a net reduction of fuel consumption.
Boscagli L., Christie R., MacManus D., Piovesan T.   +3 more
openaire   +4 more sources

Prediction of Ceiling Temperature in Tunnel Fires Under Canyon‐Wind Conditions Using Ensemble Learning

Safety Science and Technology, EarlyView.
A LightGBM‐based ensemble learning framework with SHAP interpretability analysis was developed for predicting ceiling temperature in canyon‐wind tunnel fires. The model demonstrated robust generalization (R2 = 0.7476) under unseen extreme conditions, with fire‐source location identified as the primary factor driving temperature evolution.
Qinqin Zhu, Xinyu Wang, Ao Jiao, Feifei Liu, Junyi Li, Chuangang Fan   +5 more
wiley   +1 more source

Ion‐Flow Field Modelling of ± 1100 kV Transmission Lines Under Strong‐Wind Scenarios Using the Multiple Relaxation Time Lattice Boltzmann Method

High Voltage, EarlyView.
ABSTRACT To solve the ion‐flow field of ultrahigh‐voltage direct current (UHVDC) transmission lines under strong‐wind scenarios, the multiple relaxation time lattice Boltzmann method (MRT‐LBM) is adopted. Compared with previous ion‐flow studies predominantly based on the single relaxation time LBM, the MRT‐LBM framework provides improved numerical ...
Ting Zhu, Rongbin Wang, Haidong Wang
wiley   +1 more source