【摘要】 在声学风洞中利用嵌入式齐平安装的脉动压力传感器表面线阵列，对光滑平板和不同迎角翼型的湍流边界层脉动压力波数-频率谱进行了测量和分析，从而比较波数-频率谱以及评估ChaseⅠ模型的预测性能。实验结果揭示了线阵列在测量平板和翼型的波数-频率谱方面的测量能力和准确性。平板的实测数据与ChaseⅠ模型预测较为吻合，而翼型的预测结果则显示出一定偏差，说明表面压力梯度对波数-频率谱有影响。此外，风速和迎角变化也显著影响翼型的波数-频率谱，说明ChaseⅠ模型在翼型预测上存在局限性。本文研究成果可为流激振动与噪声工程应用与领域研究提供参考。更多还原

【Abstract】 In the acoustic wind tunnel, embedded flush-mounted pressure fluctuation sensors arranged in a surface array were used to measure and analyze the wavenumber-frequency spectra of the turbulent boundary layer on a smooth plate and airfoils at different angles of attack. This study aimed to compare the wavenumber-frequency spectra and evaluate the predictive performance of the Chase Ⅰ model. The experimental results demonstrated the measurement capability and accuracy of the surface array in assessing the wavenumber-frequency spectra of both the smooth plate and the airfoils. The measured data for the smooth plate showed good agreement with the predictions of the Chase Ⅰ model, while the predictions for the airfoils exhibited some deviations, indicating that surface pressure gradients affect the wavenumber-frequency spectra. Furthermore, variations in wind speed and angle of attack significantly influenced the wavenumber-frequency spectra of the airfoils, highlighting the limitations of the Chase Ⅰ model in predicting such spectra for airfoils. The findings of this study can provide valuable references for applications and research in flow-induced vibration and noise engineering.更多还原