用于评估巴士空气动力特性的湍流模型对比分析

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-07-01 DOI:10.47176/jafm.17.7.2342

T. Huang, J. Ma, D. Yi, X. Ren, R. Ke, C. Ou, Q. Du, Q. Huang, W. Zeng

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引用次数: 0

摘要

为了确定最适合研究客车空气动力性能的湍流模型，研究了不同湍流模型对客车空气动力特性的影响。对五种湍流模型（IDDES、DDES、DES、LES、URANS）进行了比较分析。还分析了每个模型在 x=0 和 y=0 处横截面上的压力分布。结果表明，与其他模型相比，IDDES 准确捕捉到了母线后部的负压，并能更有效地预测压力梯度。IDDES 还捕获了母线头部更多的涡流，对尾流的预测也比其他模型更广泛。DDES 在尾流中有明显的脱落现象，而 IDDES 提供了相对平滑的气流轨迹，但其对远距离气流轨迹的预测不太清晰。通过对不同湍流模型下客车气动特性的定量和定性分析，可以得出 IDDES 是最适合研究客车气动特性的湍流模型。

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Comparative Analysis of Turbulence Models for Evaluating the Aerodynamic Characteristics of Bus

In order to determine the most suitable turbulence model for studying the aerodynamic performance of bus, the effects of different turbulence models on the aerodynamic characteristics of bus were investigated. A comparative analysis was conducted on five turbulence models (IDDES, DDES, DES, LES, URANS). The pressure distribution on the cross section at x=0 and y=0 is also analyzed for each model. The results reveal that IDDES accurately captures the negative pressure at the rear of the bus and predicts the pressure gradients more effectively than other models. IDDES also captures more vortices at the head of the bus and predicts the wake flow more widely than other models. DDES has obvious shedding phenomenon in the wake flow, while IDDES provides a relatively smooth airflow trajectory, but its prediction of airflow trajectory at a distance is less clear. Through quantitative and qualitative analyses of the aerodynamic characteristics of bus under different turbulence models, it can be concluded that IDDES is the most suitable turbulence model to study the aerodynamic characteristics of bus.

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .