In this paper, a point array turbulence structure is designed at the leading-edge of the standard NACA0012 airfoil, and the bump array has obvious noise reduction effect under the condition of 20 m/s and 30 m/s at the 0° angle of attack of the incoming flow, and the speed of 20 m/s and 30 m/s. Compared with the standard airfoil, the noise reduction of the total sound pressure level of the lattice leading edge airfoil is 3.6 dB under the condition of 20 m/s incoming flow, and the noise spectrum curve of the point array airfoil is lower than that of the acoustic wind tunnel background noise at 30 m/s, while the total sound pressure level of the standard airfoil is 1.5 dB higher than that of the background noise, that is, the noise reduction of the total sound pressure level of the point array airfoil is at least 1.5 dB under the condition of 30 m/s incoming flow. The LES (Large eddy simulation)/FW-H (Ffowcs williams hawkings) acoustic comparison hybrid prediction method is used to illustrate the noise reduction mechanism of the leading-edge array airfoil from the perspective of the spread coherence of the source of airfoil surface pressure disturbance. In order to solve the problem that the acoustic wind tunnel test results under the 30 m/s incoming flow condition cannot fully reflect the real noise reduction effect of the lattice airfoil, the spectral characteristics of the sound pressure level under the 20 m/s and 30 m/s incoming flow conditions are compared by numerical methods, and it is found that the lattice structure has almost the same noise reduction effect at the two speeds. Finally, the influence of parameters such as height and number of rows on the noise reduction effect of the leading-edge array structure was systematically analyzed, which provided support for the engineering parametric design of the leading-edge array turbulence structure.
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