The Prediction of the Performance of a Twisted Rudder
A new design approach using the concept of a twisted rudder to improve rudder performances has been proposed in the current paper. A correction step was introduced to obtain the accurate inflow angles induced by the propeller. Three twisted rudders were designed with different twist angle distributi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/15/7098 |
| _version_ | 1797525774636417024 |
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| author | Ilryong Park Bugeun Paik Jongwoo Ahn Jein Kim |
| author_facet | Ilryong Park Bugeun Paik Jongwoo Ahn Jein Kim |
| author_sort | Ilryong Park |
| collection | DOAJ |
| description | A new design approach using the concept of a twisted rudder to improve rudder performances has been proposed in the current paper. A correction step was introduced to obtain the accurate inflow angles induced by the propeller. Three twisted rudders were designed with different twist angle distributions and were tested both numerically and experimentally to estimate their hydrodynamic characteristics at a relatively high ship speed. The improvement in the twisted rudders compared to a reference flat rudder was assessed in terms of total cavitation amount, drag and lift forces, and moment for each twin rudder. The total amount of surface cavitation on the final optimized twin twisted rudder at a reference design rudder angle decreased by 43% and 34.4% in the experiment and numerical prediction, respectively. The total drag force slightly increased at zero rudder angle than that for the twin flat rudder but decreased at rudder angles higher than 4° and 6° in the experiment and numerical simulation, respectively. In the experimental measurements, the final designed twin twisted rudder gained a 5.5% increase in the total lift force and a 37% decrease in the maximum rudder moment. Regarding these two performances, the numerical results corresponded to an increase of 3% and a decrease of 66.5%, respectively. In final, the present numerical and experimental results of the estimation of the twisted rudder performances showed a good agreement with each other. |
| first_indexed | 2024-03-10T09:17:48Z |
| format | Article |
| id | doaj.art-5a2582a929be450b8dadfb49f2be47bb |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:17:48Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5a2582a929be450b8dadfb49f2be47bb2023-11-22T05:24:22ZengMDPI AGApplied Sciences2076-34172021-07-011115709810.3390/app11157098The Prediction of the Performance of a Twisted RudderIlryong Park0Bugeun Paik1Jongwoo Ahn2Jein Kim3Department of Naval Architecture and Ocean Engineering, Dong-Eui University, Busan 47340, KoreaKorea Research Institute of Ships & Ocean Engineering, Daejeon 34103, KoreaKorea Research Institute of Ships & Ocean Engineering, Daejeon 34103, KoreaDepartment of Naval Architecture and Ocean Engineering, Dong-Eui University, Busan 47340, KoreaA new design approach using the concept of a twisted rudder to improve rudder performances has been proposed in the current paper. A correction step was introduced to obtain the accurate inflow angles induced by the propeller. Three twisted rudders were designed with different twist angle distributions and were tested both numerically and experimentally to estimate their hydrodynamic characteristics at a relatively high ship speed. The improvement in the twisted rudders compared to a reference flat rudder was assessed in terms of total cavitation amount, drag and lift forces, and moment for each twin rudder. The total amount of surface cavitation on the final optimized twin twisted rudder at a reference design rudder angle decreased by 43% and 34.4% in the experiment and numerical prediction, respectively. The total drag force slightly increased at zero rudder angle than that for the twin flat rudder but decreased at rudder angles higher than 4° and 6° in the experiment and numerical simulation, respectively. In the experimental measurements, the final designed twin twisted rudder gained a 5.5% increase in the total lift force and a 37% decrease in the maximum rudder moment. Regarding these two performances, the numerical results corresponded to an increase of 3% and a decrease of 66.5%, respectively. In final, the present numerical and experimental results of the estimation of the twisted rudder performances showed a good agreement with each other.https://www.mdpi.com/2076-3417/11/15/7098twisted rudderrudder performancecavitation performanceCFDlarge cavitation tunnel |
| spellingShingle | Ilryong Park Bugeun Paik Jongwoo Ahn Jein Kim The Prediction of the Performance of a Twisted Rudder Applied Sciences twisted rudder rudder performance cavitation performance CFD large cavitation tunnel |
| title | The Prediction of the Performance of a Twisted Rudder |
| title_full | The Prediction of the Performance of a Twisted Rudder |
| title_fullStr | The Prediction of the Performance of a Twisted Rudder |
| title_full_unstemmed | The Prediction of the Performance of a Twisted Rudder |
| title_short | The Prediction of the Performance of a Twisted Rudder |
| title_sort | prediction of the performance of a twisted rudder |
| topic | twisted rudder rudder performance cavitation performance CFD large cavitation tunnel |
| url | https://www.mdpi.com/2076-3417/11/15/7098 |
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