Purpose

In order to certify the testing of vehicle Cd on the real road can be replaced by the much simplified steady-state simulation process inside wind tunnel.

Design/methodology/approach

The paper opted innovative methods to verify the feasibility of using aerodynamic wind tunnel test for vehicle development purpose, including establishing the typical sinusoidal mapping function for road shapes during vehicle driving process to simplify the complexity of the road and choosing three different kinds of road spectrum amplitudes to establish the vehicle motion model, which can accurately predict the vehicle motion characteristics in the road driving process. The new approach simulates the vehicle aerodynamics on the road by taking into account the pitch angle changes during vehicle motion.

Findings

By comparing the transient drag coefficient on road with the steady-state simulated value in the conventional aerodynamic wind tunnel. This paper provides empirical insights about the flow field analysis around the vehicle on road that can verify the feasibility of using aerodynamic wind tunnel test for vehicle development purpose.

Research limitations/implications

Because of establishing the typical sinusoidal mapping function for road shapes, the study results may lack generalizability. Therefore, researchers are encouraged to test the proposed propositions further.

Practical implications

This paper includes implications for the flow field analysis around the vehicle on road that can verify the feasibility of using aerodynamic wind tunnel test for vehicle development purpose.

Originality/value

This paper fulfills an identified need to use aerodynamic wind tunnel test for vehicle development purpose.

中文翻译：

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颠簸道路上车辆空气动力学仿真分析与研究

目的

为了证明在真实道路上对车辆Cd的测试，可以用风洞内部简化得多的稳态模拟过程代替。

设计/方法/方法

本文选择了创新方法来验证将空气动力学风洞测试用于车辆开发的可行性，包括在车辆驾驶过程中建立典型的道路形状正弦映射函数以简化道路的复杂性并选择三种不同的道路频谱幅度建立车辆运动模型，可以准确预测道路行驶过程中的车辆运动特性。新方法通过考虑车辆运动期间的俯仰角变化来模拟道路上的车辆空气动力学。

发现

通过比较传统空气动力学风洞中道路的瞬时阻力系数与稳态模拟值。本文提供了关于道路上车辆周围流场分析的经验见解，可以验证将空气动力学风洞试验用于车辆开发目的的可行性。

研究局限/意义

由于为道路形状建立了典型的正弦映射函数，因此研究结果可能缺乏普遍性。因此，鼓励研究人员进一步测试提出的建议。

实际影响

本文包括对道路上车辆周围流场分析的启示，可以验证将空气动力学风洞试验用于车辆开发目的的可行性。

创意/价值

本文满足了将空气动力学风洞测试用于车辆开发目的的明确需求。