尾翼攻角对斜背式轿车气动力特性影响的研究

The study of aerodynamic characteristics of a notchback car with rear wing at different angles of attack

以简化的斜背式轿车模型为研究对象,以商用计算流体力学软件STAR-CD为工具,利用移动边界条件进行三维数值模拟,计算了加装尾翼前和加装尾翼后两种车速下的车身阻力系数和升力系数,并通过与试验结果的对比,验证了数值计算结果的正确性。计算结果表明,尾翼的加装可以改善尾流结构,从而使气动力特性得到改善。

The aerodynamic characteristics of a simplified notchback car with rear wing were studied with numerical methods of moving ground boundary condition with the CFD code STAR-CD. The drag and lift coefficient of the car with rear wing at different angles of attack at two forward speeds were calculated. Compared with the test, the results of the numerical calculation were verified correctly. It was confirmed that the rear wing could improve the wake structure and so aerodynamic characteristics were enhanced.