The problem of the environmental impact of transportation is, nowadays, a crucial topic. In the maritime industry, radiated noise and comfort related issues are becoming more and more important, not only for passenger ships, but also for merchant ships. A major source of noise and vibrations from ships is represented by the propulsion system and by the propeller in particular. For this reason, design requirements are not anymore limited to the research of high propeller efficiency and of erosive cavitation avoidance, but include stringent requirements in terms of pressure pulses and radiated noise. In the present work different numerical formulations of the steady and unsteady, wetted and cavitating flow models are applied in order to assess the blade forces and moments exerted on the cavitating propeller operating in a ship wake field and its resulting pressure pulses.
Metodologie per la Progettazione di Eliche Silenziose
VACCARO, CRISTINA;VIVIANI, MICHELE
2014-01-01
Abstract
The problem of the environmental impact of transportation is, nowadays, a crucial topic. In the maritime industry, radiated noise and comfort related issues are becoming more and more important, not only for passenger ships, but also for merchant ships. A major source of noise and vibrations from ships is represented by the propulsion system and by the propeller in particular. For this reason, design requirements are not anymore limited to the research of high propeller efficiency and of erosive cavitation avoidance, but include stringent requirements in terms of pressure pulses and radiated noise. In the present work different numerical formulations of the steady and unsteady, wetted and cavitating flow models are applied in order to assess the blade forces and moments exerted on the cavitating propeller operating in a ship wake field and its resulting pressure pulses.
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