Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil
The strong increase in anthropogenic underwater noise has caused a growing intention to design quieter ships given that ship propellers are one of the dominating noise sources along the worldwide shipping routes. This creates an imminent demand for deeper knowledge on the noise generation mechanisms...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/10/2023 |
| _version_ | 1797573334738665472 |
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| author | Leonie S. Föhring Peter Møller Juhl Dietrich Wittekind |
| author_facet | Leonie S. Föhring Peter Møller Juhl Dietrich Wittekind |
| author_sort | Leonie S. Föhring |
| collection | DOAJ |
| description | The strong increase in anthropogenic underwater noise has caused a growing intention to design quieter ships given that ship propellers are one of the dominating noise sources along the worldwide shipping routes. This creates an imminent demand for deeper knowledge on the noise generation mechanisms of propeller cavitation. A cavitating, oscillating two-dimensional NACA0015 hydrofoil is analyzed with hydrophone and high-speed video recording as a simplified and manipulatable representative of a propeller blade in a ship’s wake field for the identification of major influencing parameters on the radiated noise. A pneumatic drive allows the application of asymmetrical temporal courses of the angle of attack, a novel amendment to the widely reported sinusoidal setups. Three different courses are tested with various cavitation numbers. The combination of a moderate angle increase and a rapid decrease is found to generate significantly higher pressure peaks compared to symmetrical angular courses. Considering that the rapid change of the angle of attack caused by the inhomogeneous wake field behind the hull is the core of the cavitation occurrence, the understanding of its influence may contribute to the design of quieter ships in the future while still allowing for the necessary high propeller efficiency. |
| first_indexed | 2024-03-10T21:09:21Z |
| format | Article |
| id | doaj.art-e616af440f68405db99233eb5a35aee6 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T21:09:21Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-e616af440f68405db99233eb5a35aee62023-11-19T17:00:02ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-10-011110202310.3390/jmse11102023Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 HydrofoilLeonie S. Föhring0Peter Møller Juhl1Dietrich Wittekind2Faculty of Mechanical Engineering, Kiel University of Applied Sciences, Grenzstraße 3, 24149 Kiel, GermanySiemens Gamesa Renewable Energy, DK-7330 Brande, DenmarkDW-ShipConsult GmbH, 24223 Schwentinental, GermanyThe strong increase in anthropogenic underwater noise has caused a growing intention to design quieter ships given that ship propellers are one of the dominating noise sources along the worldwide shipping routes. This creates an imminent demand for deeper knowledge on the noise generation mechanisms of propeller cavitation. A cavitating, oscillating two-dimensional NACA0015 hydrofoil is analyzed with hydrophone and high-speed video recording as a simplified and manipulatable representative of a propeller blade in a ship’s wake field for the identification of major influencing parameters on the radiated noise. A pneumatic drive allows the application of asymmetrical temporal courses of the angle of attack, a novel amendment to the widely reported sinusoidal setups. Three different courses are tested with various cavitation numbers. The combination of a moderate angle increase and a rapid decrease is found to generate significantly higher pressure peaks compared to symmetrical angular courses. Considering that the rapid change of the angle of attack caused by the inhomogeneous wake field behind the hull is the core of the cavitation occurrence, the understanding of its influence may contribute to the design of quieter ships in the future while still allowing for the necessary high propeller efficiency.https://www.mdpi.com/2077-1312/11/10/2023cavitation tunnel experimentsoscillating 2D hydrofoilcavitation noisesheet cavitation |
| spellingShingle | Leonie S. Föhring Peter Møller Juhl Dietrich Wittekind Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil Journal of Marine Science and Engineering cavitation tunnel experiments oscillating 2D hydrofoil cavitation noise sheet cavitation |
| title | Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil |
| title_full | Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil |
| title_fullStr | Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil |
| title_full_unstemmed | Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil |
| title_short | Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil |
| title_sort | experimental parameters influencing the cavitation noise of an oscillating naca0015 hydrofoil |
| topic | cavitation tunnel experiments oscillating 2D hydrofoil cavitation noise sheet cavitation |
| url | https://www.mdpi.com/2077-1312/11/10/2023 |
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