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以最小气动升力和最小俯仰力矩作为力学约束条件构建了一条理想气动形体的设计特征上凸曲线——“升力面”在汽车纵对称平面上的投影线;以结构布置和乘坐舒适性作为几何约束条件,进而构建了一个具有较低气动阻力的理想形体.通过对该形体的风洞试验验证,其阻力系数为0.145,升力系数为0.0486,俯仰力矩系数为-0.0405.证明该方法具有一定的准确性,可用于汽车车身前期的气动优化.
With the minimum aerodynamic lift and the minimum pitching moment as mechanical constraints, the design features of an ideal aerodynamic body are constructed. The convexity curve - the projection line of the “lift plane” on the longitudinal symmetry plane of the vehicle is constructed. The structural arrangement and ride comfort are taken as Geometric constraints, and then construct an ideal body with lower aerodynamic resistance.According to the wind tunnel test, the drag coefficient is 0.145, the lift coefficient is 0.0486 and the pitch moment coefficient is -0.0405.It is proved that this method has a certain The accuracy of the car can be used for the early aerodynamic optimization.