Journal of Applied Mechanical Engineering

Rajabnia H

Publications

• Research Article
  The Noise Dipole Source Prediction of Far-Field Acoustic Pressure for Marine Propeller using Inverse Method
  Author(s): Bagheri MR, Mehdigholi H, Seif MS and Rajabnia H Bagheri MR, Mehdigholi H, Seif MS and Rajabnia H
  
  The unsteady rotating force or dipole strength distribution, acting by the fan or propeller on the fluid, is predicted by inverse method. In this method, the far-field acoustic pressures are used in non-cavitating condition. In this paper, the far-field acoustic pressures are obtained from Ffowcs Williams and Hawkings (FW-H) equations using computational fluid dynamic (CFD) in specific hydrophone array and then the unsteady rotating force, acting by the propeller on the fluid, is obtained as the most important sound source in non-cavitating condition. The unsteady rotating forces are extracted using inverse method by analytical code in Matlab. The correct solution is independence to the optimum select of regularization parameter from transfer function; the transfer function represents relationship between the force coefficients and the far-field acoustic pressure. Therefore, the appro.. View More»
  DOI: 10.4172/2168-9873.1000290

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