Numerical simulation of tonal and broadband hydrodynamic noises of noncavitating underwater propeller

• Autorzy: Kheradmand S. , Rahrovi A. , Mousavi B.
• Języki publikacji: EN

Abstrakty

EN

The objective of the study was to carry out numerical simulation of the hydrodynamic noise generated by the flow around a non-cavitating underwater propeller. To achieve this goal, hydrodynamic simulation of flow around the propeller was initially done. The unsteady 3-D flow was modelled numerically along with the LES turbulence model. The hydrodynamic parameters calculated for different advance coefficients are visibly in line with the previous experimental works. The turbulent quantities of the hydrodynamic study and the FWH model were used to find spectral distributions of flow noise for different advance coefficients. The results of the acoustic investigation were compared against other numerical results. An array of 100 hydrophones was used to find the directional distribution of the noise around the propeller. The obtained results indicate that, for different advance coefficients, the highest intensity of the noise recorded by different receivers around the propeller occurs in BPF. Furthermore, it has been found that the noise is directionally as well as intensively distributed around the propeller. Noise distributions of noise are presented and discussed for different regimes of propeller rotation. The analysis of the expanded spectrum (broadband analysis) of noise on the propellers has also been done and the contribution of all parts of the propeller to hydrodynamic noise generation are presented.

Słowa kluczowe

EN

Numerical Simulation; tonal; broadband; Hydrodynamic Noise; Propeller

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2014
• Tom: nr 3
• Strony: 46--53
• Opis fizyczny: Bibliogr. 38 poz., rys.

Twórcy

autor

Kheradmand S.

• Department of Mechanical and Aerospace Engineering Malek-Ashtar University of Technology Shahin-shahr, P.O. Box 83145/115, Isfahan, Iran

autor

Rahrovi A.

• Department of Mechanical and Aerospace Engineering Malek-Ashtar University of Technology Shahin-shahr, P.O. Box 83145/115, Isfahan, Iran

autor

Mousavi B.

• Department of Mechanical and Aerospace Engineering Malek-Ashtar University of Technology Shahin-shahr, P.O. Box 83145/115, Isfahan, Iran

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