On-board measurement techniques to quantify underwater radiated noise level
Autor: | Noriyuki Sasaki, Serkan Turkmen, Mehmet Atlar, Batuhan Aktas, Weichao Shi, R Sampson |
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Rok vydání: | 2017 |
Předmět: |
Engineering
Environmental Engineering business.industry VM 020209 energy System of measurement Acoustics Sea trial Propeller Ocean Engineering 02 engineering and technology Accelerometer Pressure sensor Noise Hull 0202 electrical engineering electronic engineering information engineering Underwater business |
Zdroj: | Ocean Engineering. 130:166-175 |
ISSN: | 0029-8018 |
Popis: | Cavitating ship propellers are known to be the dominant noise source contributing significantly to the underwater radiated noise (URN) level. Innovative measurement methods using on-board devices need to be further investigated as they offer a serious alternative to traditional methods in terms of cost-efficiency and practicality. This exploratory study combined simultaneous on- and off-board noise and vibration measurements with cavitation views captured by digital photography and high speed cameras.Comprehensive full-scale trials were conducted on Newcastle University’s research vessel, The Princess Royal, in the framework of the FP7-EU project SONIC. On-board data were captured from multiple measurement systems (including. hull pressure sensors, accelerometers, optical devices, shaft strain gauges) provided by SONIC project partners CETENA, Wärtsilä , University of Southampton and Newcastle University. A new semi-empirical correlation method based on cavitating propeller pressure fluctuation and the URN level was established. Results offer clear evidence of successfully estimating URN with on-board measurements up to the middle frequency region where the blade passing fundamental and low harmonic frequencies occur. These illuminating insights reported in this paper provide valuable benchmark sea trial data in full scale. |
Databáze: | OpenAIRE |
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