Abstract
Noise generation by a moving shell with small ratio of length to width at high Reynolds number in water were studied, The interaction between the moving shell and surrounding fluid results in pressure fluctuations over the shell surface. The frequency spectra of the fluctuating pressure are different over the front part, the middle part and the rear of the shell.
The main sources of noise of the moving shell are velocity fluctuations generated by turbulent boundary layers and flow separations. The noise intensity outside the shell results from the reaction of the rigid shell to the fluctuating velocity and the shell vibration excited by it.
The cross — power spectral density of the noise inside the shell is proportional to the moving speed and the resistance coefficient.
The results of model experiment show that the power spectral density of the noise inside the two shells have differences of the order of 5 db. In order to reduce interior noise, the shell should have a proper shape.
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© 1986 Martinus Nijhoff Publishers, Dordrecht
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Xiqing, Z. (1986). Sound Generation from a Moving Shell. In: Buiten, J. (eds) Shipboard Acoustics. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3515-0_12
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DOI: https://doi.org/10.1007/978-94-009-3515-0_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8070-5
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