(烏蘭察布市公路管理局， 烏蘭察布 012000)

［摘要］強橫風作用會導致車輛失穩事故。采用數值仿真（CFD）方法進行了行駛車輛在橫風作用下空氣動力學穩定性研究。介紹了網格模型和數值方法基礎理論，通過對車體模型、網格類型、網格數量、湍流模型和邊界條件的介紹，搭建車輛在側風環境下的氣動力分析數值平臺。然后采用該數值平臺進行輕型卡車模型在不同工況條件下的空氣動力學穩定性分析。最后獲得了車輛失穩的臨界值，為車輛在橫風環境下安全行駛，提供基礎數據。分析結果表明，開孔擋風板的壓降與粘性阻力呈二次方關系，與慣性阻力呈線性變化關系，其數值直接影響車輛側風穩定性。 

［關鍵詞］擋風板；側風效應；空氣動力學穩定性；數值仿真

中圖分類號：TU398-7 文獻標識碼：A文章編號：1002-848X(2021)24-0092-05

Study on cross-wind effects of driving vehicles on wind-barriers road 

LIU  Hongwei 

(Highway Administration Bureau of Wulanchabu City, Wulanchabu 012000，China) 

Abstract: The effects of strong cross-wind can cause vehicle instability accidents. A numerical simulation (CFD) method is adopted to study the aerodynamic stability of a driving vehicle under cross-wind. The grid model and basic theory numerical method were introduced and a numerical platform for aerodynamic analysis of the vehicle in the side seam environment was built through the introduction of the car body model, grid type, number of grids, turbulence model and boundary conditions. Then the aerodynamic stability analysis of the light truck model under different working conditions was analyzed by this numerical platform. Finally, the critical value of vehicle instability was obtained to provide basic data for the safe driving of the vehicle in a cross-wind environment. The results show that the pressure drop of the perforated baffle has a quadratic relation with the viscous resistance and a linear relation with the inertia resistance, and its value directly affects the crosswind stability of the vehicle. 

Keywords:wind-barrier； cross-wind effect； aerodynamic stability； numerical simulation

作者簡介：劉宏偉，學士，高級工程師，Email: 1515967307@qq.com。