Array experimental study on turbulent boundary layer fluctuation pressure wavenumber-frequency spectrum of airfoil/plate in acoustic wind tunnel
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.
wavenumber-frequency spectrumairfoilflat platesurface array of pulsating pressure sensorsChase Ⅰ mode
万方数据
维普
