Experimental and Numerical Study of Pre-Swirl Stators PSS
Energy saving within shipping is gaining more attention due to environmental awareness, financial incentives, and, most importantly, new regional and international rules, which limit the acceptable emission from the ships considerably. One of the measures is installation of energy saving devices (ES...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/1/47 |
| _version_ | 1818664412582510592 |
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| author | Kourosh Koushan Vladimir Krasilnikov Marco Nataletti Lucia Sileo Silas Spence |
| author_facet | Kourosh Koushan Vladimir Krasilnikov Marco Nataletti Lucia Sileo Silas Spence |
| author_sort | Kourosh Koushan |
| collection | DOAJ |
| description | Energy saving within shipping is gaining more attention due to environmental awareness, financial incentives, and, most importantly, new regional and international rules, which limit the acceptable emission from the ships considerably. One of the measures is installation of energy saving devices (ESD). One type of such a device, known as pre-swirl stator (PSS), consists of a number (usually 3 to 5) of fins, which are mounted right in front of the propeller. By modifying the inflow and swirl into the propeller, the fins of a PSS have the possibility to increase the total propulsion efficiency. However, at the same time, they may introduce additional resistance either due to changes in pressure distribution over the aft ship or due to its own resistance of fins. In this paper, the authors present experimental and numerical investigation of a PSS for a chemical tanker. Numerical analysis of the vessel with and without PSS is performed in the model and full scale. Model testing is performed with and without PSS to verify the power savings predicted numerically. Among other quantities, 3D wake field behind the hull is densely measured at different planes, starting from the PSS plane to the rudder stock plane. 3D wake measurements are also conducted with a running propeller. The measurements show considerable improvement in the performance of the vessel fitted with PSS. On the numerical side, analyses show that scale effect plays an important role in the ESD performance. Investigation of the scale effect on the vessel equipped with an ESD provides new insight for the community, which is investing more into the development of energy saving devices, and it offers valuable information for the elaboration of scaling procedures for such vessels. |
| first_indexed | 2024-12-17T05:32:20Z |
| format | Article |
| id | doaj.art-8478caf3d20141838422f6ec06cd16dd |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-12-17T05:32:20Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-8478caf3d20141838422f6ec06cd16dd2022-12-21T22:01:41ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-01-01814710.3390/jmse8010047jmse8010047Experimental and Numerical Study of Pre-Swirl Stators PSSKourosh Koushan0Vladimir Krasilnikov1Marco Nataletti2Lucia Sileo3Silas Spence4Department of Ship and Ocean Structures, SINTEF Ocean AS, 7465 Trondheim, NorwayDepartment of Ship and Ocean Structures, SINTEF Ocean AS, 7465 Trondheim, NorwayDepartment of Ship and Ocean Structures, SINTEF Ocean AS, 7465 Trondheim, NorwayDepartment of Ship and Ocean Structures, SINTEF Ocean AS, 7465 Trondheim, NorwaySkaMik AS, 7940 Ottersøy, NorwayEnergy saving within shipping is gaining more attention due to environmental awareness, financial incentives, and, most importantly, new regional and international rules, which limit the acceptable emission from the ships considerably. One of the measures is installation of energy saving devices (ESD). One type of such a device, known as pre-swirl stator (PSS), consists of a number (usually 3 to 5) of fins, which are mounted right in front of the propeller. By modifying the inflow and swirl into the propeller, the fins of a PSS have the possibility to increase the total propulsion efficiency. However, at the same time, they may introduce additional resistance either due to changes in pressure distribution over the aft ship or due to its own resistance of fins. In this paper, the authors present experimental and numerical investigation of a PSS for a chemical tanker. Numerical analysis of the vessel with and without PSS is performed in the model and full scale. Model testing is performed with and without PSS to verify the power savings predicted numerically. Among other quantities, 3D wake field behind the hull is densely measured at different planes, starting from the PSS plane to the rudder stock plane. 3D wake measurements are also conducted with a running propeller. The measurements show considerable improvement in the performance of the vessel fitted with PSS. On the numerical side, analyses show that scale effect plays an important role in the ESD performance. Investigation of the scale effect on the vessel equipped with an ESD provides new insight for the community, which is investing more into the development of energy saving devices, and it offers valuable information for the elaboration of scaling procedures for such vessels.https://www.mdpi.com/2077-1312/8/1/47energy saving devices (esd)pre-swirl stator (pss)scale effect3d wake measurements with a working propeller |
| spellingShingle | Kourosh Koushan Vladimir Krasilnikov Marco Nataletti Lucia Sileo Silas Spence Experimental and Numerical Study of Pre-Swirl Stators PSS Journal of Marine Science and Engineering energy saving devices (esd) pre-swirl stator (pss) scale effect 3d wake measurements with a working propeller |
| title | Experimental and Numerical Study of Pre-Swirl Stators PSS |
| title_full | Experimental and Numerical Study of Pre-Swirl Stators PSS |
| title_fullStr | Experimental and Numerical Study of Pre-Swirl Stators PSS |
| title_full_unstemmed | Experimental and Numerical Study of Pre-Swirl Stators PSS |
| title_short | Experimental and Numerical Study of Pre-Swirl Stators PSS |
| title_sort | experimental and numerical study of pre swirl stators pss |
| topic | energy saving devices (esd) pre-swirl stator (pss) scale effect 3d wake measurements with a working propeller |
| url | https://www.mdpi.com/2077-1312/8/1/47 |
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