This paper presents the SNGR (Stochastic Noise Generation and Radiation) method. Based on RANS simulation input, this method strongly reduces the computation cost associated with the CFD simulation in comparison to direct LES-based acoustic noise source computations. After the theoretical description of the method, this work will analyze the numerical convergence of the different parameters involved in the source generation, namely: (i) number of random samples; (ii) number of turbulent modes; and (iii) CFD cell size. The numerical efficiency will also be evaluated. To do so, the solution for a low Mach number (M<0.1) panel HVAC duct will be considered and compared with experimental data and acoustic predictions based on unsteady CFD simulations available in the literature.
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