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A hybrid prediction for wind buffeting noises of vehicle rear window based on LES-LAA method

机译：基于LES-LAA方法的车辆后窗风抖噪声混合预测

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摘要

Based on the theories of computational fluid dynamics (CFD) and aeroacoustics, a hybrid simulation technique, the so-called LES-LAA method is proposed in this paper, for predicting the wind buffeting noises generated by opening rear windows of a running vehicle. The LES-LAA is developed by combining the large eddy simulation (LES) and the Lighthill acoustic analogy (LAA) methods. Based on the established vehicle and wind tunnel models, the wind buffeting noises from rear windows are predicted by using the proposed LES-LAA method and the obtained results are compared with experimental data. The results show that the calculation error of sound pressure level (SPL) from the LES-LAA method is less than 2%, which suggests that the proposed method has good accuracy in predicting the wind noise of the rear window of a vehicle. The wind noise when both sides of the rear window are opened at the same time is much lower than the case when just one window is opened. In conclusion, the hybrid LES-LAA technique presented in this paper is effective and feasible for predicting the wind buffeting noise, which can be applied to other types of vehicle and is a promising approach for solving other aero-acoustical engineering problems.
机译：基于计算流体动力学（CFD）和航空声学的理论，本文提出了一种混合仿真技术，即所谓的LES-LAA方法，用于预测行驶中的车辆后窗打开时产生的风抖动噪声。 LES-LAA是通过结合大型涡流模拟（LES）和Lighthill声学类比（LAA）方法而开发的。在建立的车辆和风洞模型的基础上，采用提出的LES-LAA方法预测了后车窗的风抖动噪声，并将所得结果与实验数据进行了比较。结果表明，LES-LAA方法的声压级（SPL）计算误差小于2％，表明该方法在预测车辆后窗风噪声方面具有良好的准确性。同时打开后窗两侧时的风噪比仅打开一个车窗时的风噪要低得多。总之，本文提出的混合LES-LAA技术对于风振噪声的预测是有效可行的，可以应用于其他类型的车辆，是解决其他航空声学工程问题的有前途的方法。

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  • 来源
    《Applied Mathematical Modelling》 |2017年第7期|160-173|共14页
  • 作者

    Wang Yansong; Sui L. N.; Yin Z. Y.; Wang X. L.; Liu Ningning; Guo Hui;

  • 作者单位

    School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai, China,Department of Mechanical and electrical Engineering, Shanghai Construction Engineering School, Shanghai, China;

    Department of Mechanical and electrical Engineering, Shanghai Construction Engineering School, Shanghai, China;

    School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai, China;

    School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai, China;

    School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai, China;

    School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Large eddy simulation (LES); Lighthill acoustic analogy (LAA); Vehicle rear window; Wind buffeting noise;

    机译：大涡模拟（LES）;Lighthill声学类比（LAA）;车辆后窗;风振颤噪声;

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