{"title":"Numerical study of reduction of unsteady effects in bow thruster","authors":"M. Kazemi , M. Dause , J. Hinnenthal , N. Kornev","doi":"10.1016/j.oceaneng.2025.120660","DOIUrl":null,"url":null,"abstract":"<div><div>The article presents a numerical study of the effectiveness of reducing pressure and thrust pulsations in the bow thruster due to two technical measures: rounding the entrance to the tunnel and using a protection grille of a new design. The study involved the methods of turbulence modeling RANS and hybrid RANS/LES, as well as the Objective Genetic Optimization Algorithm. A significant decrease in the separation zone at the tunnel entrance, a decrease in the volume of the cavity and, associated with these two processes, a significant decrease in pressure and thrust pulsations have been documented. This indicates the possibility of a significant reduction in acoustic emission and vibration due to the passive flow control methods proposed.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"324 ","pages":"Article 120660"},"PeriodicalIF":4.6000,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ocean Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0029801825003750","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
The article presents a numerical study of the effectiveness of reducing pressure and thrust pulsations in the bow thruster due to two technical measures: rounding the entrance to the tunnel and using a protection grille of a new design. The study involved the methods of turbulence modeling RANS and hybrid RANS/LES, as well as the Objective Genetic Optimization Algorithm. A significant decrease in the separation zone at the tunnel entrance, a decrease in the volume of the cavity and, associated with these two processes, a significant decrease in pressure and thrust pulsations have been documented. This indicates the possibility of a significant reduction in acoustic emission and vibration due to the passive flow control methods proposed.
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