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Numerical Investigation on the Cavitating Flow and the Cavitation-induced Noise in the Pump-jet Propeller

Publish Year: 1404
Type: Journal paper
Language: English
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JR_JAFM-18-2_009

Index date: 11 December 2024

Numerical Investigation on the Cavitating Flow and the Cavitation-induced Noise in the Pump-jet Propeller abstract

The noise hazard posed by cavitation in pump-jet propellers is a significant concern during oceanic operations. This study evaluates the cavitation performance and associated noise characteristics of pump-jet propellers in underwater conditions, further examining the interplay between cavitation phenomena and noise radiation. Cavitation performance across varying advance coefficients was scrutinized using the k-ω SST turbulence model alongside the Zwart cavitation model. Employing Lighthill’s analogy method and bubble radiation theory, analyses of flow-induced noise and noise due to cavitation were conducted. The findings indicate an intensification of cavitation within the pump-jet with increased rotational speed and a reduction in cavitation number, aligning pressure and velocity distributions with observed cavitation patterns. Cavitation markedly elevates flow-induced noise levels, with noise under cavitation conditions found to be around 50 dB higher compared to non-cavitation conditions. Considering cavitation bubble radiation noise, the volumetric pulsations and their amplitudes in the pump-jet enlarge as the bubbles progress through initial growth to maturity. Predominantly, the noise levels from bubble volume pulsations occur within low to medium frequency ranges.

Numerical Investigation on the Cavitating Flow and the Cavitation-induced Noise in the Pump-jet Propeller Keywords:

Numerical Investigation on the Cavitating Flow and the Cavitation-induced Noise in the Pump-jet Propeller authors

P. Zhang

National Research Center of Pump, Jiangsu University, Zhenjiang ۲۱۲۰۱۳, Jiangsu, China

J. Yuan

National Research Center of Pump, Jiangsu University, Zhenjiang ۲۱۲۰۱۳, Jiangsu, China

Y. Fu

School of Energy and Power Engineering, Jiangsu University, Zhenjiang ۲۱۲۰۱۳, Jiangsu, China

X. Hou

National Research Center of Pump, Jiangsu University, Zhenjiang ۲۱۲۰۱۳, Jiangsu, China

J. Hao

National Research Center of Pump, Jiangsu University, Zhenjiang ۲۱۲۰۱۳, Jiangsu, China

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