## 1 Introduction  
The wind noise sources generated by turbulent flow play an important role to the interior noise sound pressure level (SPL) of the vehicle. [PERSON] et al. [1] first used the wavenumber-frequency spectrum (WFS) to analyze the excitation component of the external flow field. It was found that the acoustic component with the low wavenumber in the external flow field has a great influence on the sound transmission of the structure exposed in the flow field, but the low wavenumber component of turbulent boundary layer (TBL) cannot be defined. The wind tunnel test, the transient computational fluid dynamics (CFD) simulation and the WFS analysis are used to verify the existence of the acoustic component of the outflow field in [2; 3; 4]. In order to analyze the effect of the acoustic component on the interior noise SPL of the vehicle, the characteristics of the acoustic component were studied. The researches show: both the convective and acoustic component are equally important contributors for the noise transmission to the vehicle cabin although the TBL pressure is 25 to 35 dB higher in level than that of the corresponding acoustic component [1]. There are many kinds methods for calculating the response under the TBL excitation. One of the models for the TBL is presented by [PERSON] [5]. Then, [PERSON] and [PERSON] built models derived from [PERSON] expression, which can improve the predictions for the low-frequency range [4; 6], [PERSON] et al. [7] used the Chase-like model and Corcos model to describe the wall pressure excitation of the TBL flow, and compared and analyzed the results of TBL calculated by the two models. [PERSON] et al. [8] developed a \"rain on the roof\" excitation equivalent to acoustic and aerodynamic excitation. The model was equivalent in wavenumber space. The TBL excitation was verified based on the Corcos model, which proved the effectiveness of predicting the power spectral density (PSD) of the velocity. [PERSON] et al. [9] used a second order moment matching method based on previous studies to achieve a fully coupled structural progression system that reduced the wide-band frequency range under actual aerodynamic distributed excitation. It also described the expression form of TBL equivalent correlation function when it was applied on a plate. [PERSON] et al. [10] studied the response of composite plates under the TBL excitation and performed numerical and experimental studies. [PERSON] et al. [11] developed a method to characterize the vibration response method of the plate to the diffuse acoustic field (DAF) excitation based on the DAF theoretical model and the sensitivity function of the plate. Because the acoustic component can be easily coupled with the radiating modes of the panel [12], [PERSON] et al. [13] designed an experiment to analyze the sound radiation of a car window under the flow-induced excitation, but no acoustic component was found due to the aliasing effect. Later, [PERSON] [14] and [PERSON] et al. [15] demonstrated the existence of the acoustic source through the CFD compressible flow simulation with the wavenumber-frequency \((k-\omega)\) method. In order to capture the acoustic component, the CFD compressible turbulent flow data is necessary if the acoustic wind tunnel (AWT) is not available. Besides, there are many practical difficulties to separate out the acoustic component in the AWT test, such as the transducer size and locations, the background noise, etc. Moreover, the CFD compressible method is time-consuming and the grid size needs to be very small to capture the acoustic component. However, the CFD incompressible flow simulation costs less time and can be conducted easily. So, how to predict vehicle interior noise accurately based on the CFD incompressible flow data is a concern. [PERSON] et al. [16] proposed several models to predict cabin interior noise based on the CFD compressible, incompressible simulation and experiment results, but no comparison between different models was acquired.