Special lssues
Table of Content

Computer Modeling in Vehicle Aerodynamics

Submission Deadline: 15 April 2024 Submit to Special Issue

Guest Editors

A.Prof. Tian Li, Southwest Jiaotong University, China
Prof. Tiantian Wang, Hunan University, China
A.Prof. Zhenxu Sun, Institute of Mechanics, Chinese Academy of Sciences, China
Dr. Zhengwei Chen, The Hongkong Polytechnic University, China

Summary

In recent years, energy efficiency and legislative requirements for reducing carbon dioxide and other emissions have become a worldwide hot topic. Vehicle aerodynamics is the research subject of how air flows around and inside the vehicle, including trains, cars, and so on. The airflow around and through the vehicle begins to have a considerable effect on the running speed, and fuel efficiency. Vehicle aerodynamics plays a significant role in saving energy for future requirements of a climate-friendly environment. Its main goals are reducing aerodynamic drag, aerodynamic noise, and other causes of aerodynamic instability at high speeds. The methods of studying the vehicle aerodynamics mainly include computer modelling and wind tunnel testing. Therefore, it is necessary to conduct in-depth research in the field of computer modeling in vehicle aerodynamics. In order to make specific progress in this area, the special issue focuses on the contents of the study of computer modeling in vehicle aerodynamics, including numerical simulation method, aerodynamic shape design, aerodynamic drag reduction, vehicle aeroacoustics, wake flows, internal ventilation inside vehicles, etc.


Keywords

Aerodynamic shape design, aerodynamic drag reduction, vehicle aeroacoustics, numerical simulation method

Published Papers


  • Open Access

    ARTICLE

    Numerical Study on Reduction in Aerodynamic Drag and Noise of High-Speed Pantograph

    Deng Qin, Xing Du, Tian Li, Jiye Zhang
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 2155-2173, 2024, DOI:10.32604/cmes.2023.044460
    (This article belongs to this Special Issue: Computer Modeling in Vehicle Aerodynamics)
    Abstract 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 theory and the K-FWH acoustic equation, a numerical simulation is conducted to investigate the aerodynamic characteristics of high-speed pantographs. A component optimization method is proposed as a possible solution to the problem of aerodynamic drag and noise in high-speed pantographs. The results of the study indicate that the panhead, base and insulator are the main contributors to aerodynamic drag and noise in high-speed pantographs. Therefore, a gradual optimization process is implemented to… More >

  • Open Access

    ARTICLE

    Effect of Bogie Cavity End Wall Inclination on Flow Field and Aerodynamic Noise in the Bogie Region of High-Speed Trains

    Jiawei Shi, Jiye Zhang
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 2175-2195, 2024, DOI:10.32604/cmes.2023.043539
    (This article belongs to this Special Issue: Computer Modeling in Vehicle Aerodynamics)
    Abstract Combining the detached eddy simulation (DES) method and Ffowcs Williams-Hawkings (FW-H) equation, the effect of bogie cavity end wall inclination on the flow field and aerodynamic noise in the bogie region is numerically studied. First, the simulation is conducted based on a simplified cavity-bogie model, including five cases with different inclination angles of the front and rear walls of the cavity. By comparing and analyzing the flow field and acoustic results of the five cases, the influence of the regularity and mechanism of the bogie cavity end wall inclination on the flow field and the aerodynamic noise of the bogie… More >

  • Open Access

    ARTICLE

    Influence of Anteroposterior Symmetrical Aero-Wings on the Aerodynamic Performance of High-Speed Train

    Peiheng He, Jiye Zhang, Lan Zhang, Jiaqi Wang, Yuzhe Ma
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 937-953, 2024, DOI:10.32604/cmes.2023.043700
    (This article belongs to this Special Issue: Computer Modeling in Vehicle Aerodynamics)
    Abstract The running stability of high-speed train is largely constrained by the wheel-rail coupling relationship, and the continuous wear between the wheel and rail surfaces will profoundly affect the dynamic performance of the train. In recent years, under the background of increasing train speed, some scientific researchers have proposed a new idea of using the lift force generated by the aerodynamic wings (aero-wing) installed on the roof to reduce the sprung load of the carriage in order to alleviate the wear and tear of the wheel and rail. Based on the bidirectional running characteristics of high-speed train, this paper proposes a… More >

  • Open Access

    ARTICLE

    Parametric Optimization of Wheel Spoke Structure for Drag Reduction of an Ahmed Body

    Huihui Zhai, Dongqi Jiao, Haichao Zhou
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 955-975, 2024, DOI:10.32604/cmes.2023.043322
    (This article belongs to this Special Issue: Computer Modeling in Vehicle Aerodynamics)
    Abstract The wheels have a considerable influence on the aerodynamic properties and can contribute up to 25% of the total drag on modern vehicles. In this study, the effect of the wheel spoke structure on the aerodynamic performance of the isolated wheel is investigated. Subsequently, the 35° Ahmed body with an optimized spoke structure is used to analyze the flow behavior and the mechanism of drag reduction. The Fluent software is employed for this investigation, with an inlet velocity of 40 m/s. The accuracy of the numerical study is validated by comparing it with experimental results obtained from the classical Ahmed model.… More >

  • Open Access

    ARTICLE

    Influences of the Fresh Air Volume on the Removal of Cough-Released Droplets in a Passenger Car of a High-Speed Train Using CFD

    Jun Xu, Kai Bi, Yibin Lu, Tiantian Wang, Hang Zhang, Zeyuan Zheng, Fushan Shi, Yaxin Zheng, Xiaoying Li, Jingping Yang
    CMES-Computer Modeling in Engineering & Sciences, Vol.138, No.3, pp. 2727-2748, 2024, DOI:10.32604/cmes.2023.031341
    (This article belongs to this Special Issue: Computer Modeling in Vehicle Aerodynamics)
    Abstract The spread and removal of pollution sources, namely, cough-released droplets in three different areas (front, middle, and rear areas) of a fully-loaded passenger car in a high-speed train under different fresh air flow volume were studied using computational fluid dynamics (CFD) method. In addition, the structure of indoor flow fields was also analysed. The results show that the large eddies are more stable and flow faster in the air supply under Mode 2 (fresh air volume: 2200 m3/h) compared to Mode 1 (fresh air volume: 1100 m3/h). By analysing the spreading process of droplets sprayed at different locations in the passenger car… More >

Share Link