汽车工程 ›› 2025, Vol. 47 ›› Issue (9): 1752-1762.doi: 10.19562/j.chinasae.qcgc.2025.09.011

• • 上一篇    

湍流模型参数对气动力仿真精度影响研究

尚文强,张风利,王文江(),罗秋丽,周鹏   

  1. 比亚迪汽车工业有限公司,深圳 518000
  • 收稿日期:2025-01-03 修回日期:2025-04-08 出版日期:2025-09-25 发布日期:2025-09-19
  • 通讯作者: 王文江 E-mail:wangwenjiang1993@163.com
  • 基金资助:
    国家重点研发计划项目(2022YFE0208000);国家重点研发计划项目(2021YFB2501705);中国汽车工程学会青年人才托举工程(2023年度)资助

Study on Effect of Turbulence Model Coefficients on Accuracy of Aerodynamic Simulation

Wenqiang Shang,Fengli Zhang,Wenjiang Wang(),Qiuli Luo,Peng Zhou   

  1. BYD Auto Industry Company Limited,Shenzhen 518000
  • Received:2025-01-03 Revised:2025-04-08 Online:2025-09-25 Published:2025-09-19
  • Contact: Wenjiang Wang E-mail:wangwenjiang1993@163.com

摘要:

剪切应力输运(shear-stress-transport, SST) k-ω湍流模型是目前综合性能最佳的双方程湍流模型之一,广泛应用于汽车空气动力学研究。已有研究表明,SST?k-ω湍流模型参数对车辆的气动力仿真精度具有显著的影响。然而,大多数研究大多局限于简化模型。为此,本文研究了在车轮静止条件下,湍流模型参数对某三厢轿车气动力仿真精度的影响。研究发现,湍流模型参数σw1σw2β*CT与气动阻力、气动升力均呈线性关系,而a1与气动阻力、气动升力呈近似二次关系。进一步地,本文揭示了这些参数对汽车外流场的影响机理,并给出了改善气动力仿真精度的湍流模型参数推荐值:σω1=0.3σω2=0.7β*=0.06a1=0.5CT=1.0。本文为汽车更准确、更可靠的气动力仿真提供了理论与工程指导。

关键词: 汽车空气动力学, 湍流模型参数, 气动阻力, 气动升力

Abstract:

The shear-stress-transport (SST) k-ω turbulence model is one of the best comprehensive two-equation turbulence models available and is widely used in the research of automotive aerodynamics. The existing studies have shown that the closure coefficients in the SST?k-ω turbulence model significantly affect the accuracy of aerodynamic simulation for vehicles. However, most researches are limited to simplified models. Therefore, in this paper, the impact of the typical turbulence model coefficients on the accuracy of aerodynamic simulations of a sedan is studied under stationary wheel conditions. It is found that the turbulence model coefficients σω1,?σω2,?β*and CT are linearly related to aerodynamic drag and lift, while approximately quadratic for a1. Furthermore, this paper uncovers the influence mechanism of turbulence model coefficients on the flow field around the vehicle, and the recommended values for turbulence model coefficients to improve the accuracy of aerodynamic simulation are provided: σω1=0.3σω2=0.7β*=0.06a1=0.5 and CT=1.0.This paper provides theoretical and engineering guidance for more accurate and reliable aerodynamic simulation of vehicles.

Key words: automotive aerodynamics, turbulence model coefficients, aerodynamic drag, aerodynamic lift