Meanwhile , numerical computation of aerodynamics is widely applied with the progress of computer , large quantities of relative paper has been presented . but at present , the relative literature about turbulence characteristics of plural vehicles running in row and passing maneuvers is very limited . pointing to the above difficulty , in this paper , numerical computation of turbulent - velocity field is studied while a sedan exceeding a tractor - trailer truck 本論文在對某國產(chǎn)轎車單車外流場的模擬地面邊界層、車輪轉(zhuǎn)動和側(cè)向風(fēng)載荷研究基礎(chǔ)上,以及兩輛轎車并列行駛、同向超車的穩(wěn)態(tài)研究的基礎(chǔ)上,選取了兩種笛卡爾網(wǎng)格方案和四面體混合網(wǎng)格方案,開展某國產(chǎn)轎車超過某大型運輸車的數(shù)值模擬研究。