Study on Effects of Integral Surface Parameters of FW-H Equation on Noise Prediction of Turbulent Flows around Cylinder
A cylinder is a simple blunt body,and water flow through the cylinder is prone to flow separation.At this time,the vortex shedding is obvious and has strong periodicity,which is a typical noise prediction research object.The flow around a cylinder can serve as the foundation for research on engineering equipment such as risers and anchor chains.In this paper,the Detached Eddy Simulation(DES)and the naoe-FOAM-SJTU solver is applied to simulate the turbulent flow of two-dimensional cylinders.Based on the Lighthill equation,the patch surface,the porous surface,unclosed porous surface and closed porous surface are respectively compared.The optimal parameter settings for length and width are studied.Three probes are set,and the application of FFT on the sound pressure at the probes obtains the spectrum results of the sound pressure levels.So as to get the optimal hydrodynamic noise porous integral surface configuration,which lays the foundation for improving the accuracy of hydrodynamic noise prediction.
Hydrodynamic noiseThe fluid flow around a cylinderAcoustic analogyPorous integral surfacenaoe-FOAM-SJTU solver
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