Study on flow-induced noise propagation mechanism of cylinder–airfoil interference model by using large eddy simulation combined with vortex–acoustic equation
نویسندگان
چکیده
An innovative numerical prediction method of flow-induced noise is implemented to overcome the defect that traditional acoustic analogy cannot reflect interaction between turbulence vortex and sound. The classical cylindrical–airfoil interference model used perform simulation compared with experimental results. To start derivation Powell’s sound equation, an implicit three-dimensional fluid–acoustic coupling field established process unsteady iterative calculation. large eddy adopted solve flow, information then calculated using equation at each iteration step. structures around cylinder airfoil are identified captured by Q-criterion for further analysis vortex–noise correlation mechanism. results finally Ffowcs Williams–Hawkings (FW–H) approach. show shedding from have greatest influence on acoustic, far-field shows a partial “eight” dipole distribution. theory closer ones than FW–H method. research helps understand mechanism cylinder–airfoil provides more accurate noise.
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ژورنال
عنوان ژورنال: AIP Advances
سال: 2023
ISSN: ['2158-3226']
DOI: https://doi.org/10.1063/5.0138084