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中文摘要：
采用大涡模拟的数值方法，对30°后倾角类车体外流场进行计算。对计算所得结果（阻力、升力、二维速度）进行统计分析，参考已发表文献数据，在证明计算方法有效性的基础上得出相关结论：在0°偏航角情况下，几何对称的类车体,其外流场非稳态参数并非完全对称。
英文摘要：
The airflow around the Ahmed body with 30° slant angle has been simulated using I.ES. By statistically analyzing the computational results including drag force, lift force and 3D velocity, consulting the data belong to published reference; the computational method has been validated. The key conclusion is that with 0° yawing angle, the unsteady parameters of airflow around Ahmed body with symmetry geometry are not absolutely symmetrical.
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