CAJ | 학술논문

汽车底部流场对整车气动性能具有重要影响，车体底部产生的气动阻力可占到整车阻力的30%左右。本文针对某运动型多用途汽车(SUV)，采用计算流体动力学(CFD)数值模拟的方法，在车速120km/h 的工况下，分析了汽车底部添加气动附件(前阻流板、车轮前后阻风板、车体底部导流板)对整车气动性能的影响。分析结果表明，在车体底部和轮胎附近添加合适的气动附件，使得整车气动阻力下降了大约6%。
기차저부류장대정차기동성능구유중요영향，차체저부산생적기동조력가점도정차조력적30%좌우。본문침대모운동형다용도기차(SUV)，채용계산류체동역학(CFD)수치모의적방법，재차속120km/h 적공황하，분석료기차저부첨가기동부건(전조류판、차륜전후조풍판、차체저부도류판)대정차기동성능적영향。분석결과표명，재차체저부화륜태부근첨가합괄적기동부건，사득정차기동조력하강료대약6%。
The flow structure under the car, which caused about 30% air resistance of the vehicle, has a significant influence on the vehicle’s aerodynamic performance. A CFD(Computational Fluid Dynamics) method is used to do research on aerodynamic accessories’ (including front damp panel, front wheel damp panels, rear wheel damp panels, and guiding panel under the middle of the car) influence on a SUV(Sport Utility Vehicle) at the speed of 120kph. The result showed that proper design of aerodynamic accessories under the vehicle could decrease the air resistance by nearly 6 percent.