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- W201442016 abstract "There are many approaches in determining the sound propagated from turbulent flows. Hybrid approaches, in which the turbulent noise source field is computed or modeled separately from the far-field calculation, are frequently used. To have a more feasible approach for basic estimation of sound propagation, cheaper methods can be developed using stochastic modeling of the turbulent fluctuations (turbulent noise source field). In this paper, a simple and easy to use stochastic model for the generation of turbulent velocity fluctuations called continuous filter white noise (CFWN) model is used. This method is based on the use of classical Langevian-equation to model the details of fluctuating field superimposed on averaged computed quantities. The sound propagation due to the generated unsteady field is evaluated using Lighthill's acoustic analogy. Our results are validated by comparing the directivity and the overall sound pressure level (OSPL) magnitudes with the available experimental results. Numerical results show reasonable agreement with the experiments, both in maximum directivity and magnitude of the OSPL." @default.
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- W201442016 date "2007-01-01" @default.
- W201442016 modified "2023-09-28" @default.
- W201442016 title "Combination of Lighthill Acoustic Analogy and Stochastic Turbulence Modelling for Far-Field Acoustic Prediction" @default.
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