کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6756994 | 1431091 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Trailing edge noise prediction based on wall pressure spectrum models for NACA0012 airfoil
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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![عکس صفحه اول مقاله: Trailing edge noise prediction based on wall pressure spectrum models for NACA0012 airfoil Trailing edge noise prediction based on wall pressure spectrum models for NACA0012 airfoil](/preview/png/6756994.png)
چکیده انگلیسی
This paper compares several approaches for the prediction of the noise emitted by a NACA0012 airfoil at 0â and 4â of angle of attack and a Reynolds number Re=1.5Ã106. Amiet's semi-analytical model for trailing-edge noise is combined with two-dimensional Reynolds-Averaged Navier-Stokes (RANS) computations. The wall-pressure spectrum, which constitutes the cornerstone of Amiet's model, is obtained by processing the boundary layer data extracted from the simulations. The specific contribution of the paper is a comparison of two families of prediction methods: semi-empirical wall-pressure models that are fitted to experimental databases, and statistical approaches based on the integration of the Poisson equation across the boundary layer profile. The semi-empirical models that were calibrated on airfoil databases provide better predictions with experiments, while the models based on flat-plate boundary layer data fail to reproduce the measured spectra. Considering the statistical approach, it was shown to predict the general spectral features, but with an overall under-prediction of about 3â¯dB. It can be concluded from this study that the statistical approach proves indeed more robust than semi-empirical models when the latter were not precisely calibrated for the flow under consideration. Further improvements of the statistical approach are suggested for future work.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 175, April 2018, Pages 305-316
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 175, April 2018, Pages 305-316
نویسندگان
Yakut Cansev Küçükosman, Julien Christophe, Christophe Schram,