Ship Technology Research最新文献_第6页

An alternative Vorticity based Adaptive Mesh Refinement (V-AMR) technique for tip vortex cavitation modelling of propellers using CFD methods 基于涡度的自适应网格细化(V-AMR)技术在螺旋桨叶顶涡空化CFD建模中的应用

IF 2.2

Ship Technology Research Pub Date : 2021-05-17 DOI: 10.1080/09377255.2021.1927590

Savas Sezen, M. Atlar

{"title":"An alternative Vorticity based Adaptive Mesh Refinement (V-AMR) technique for tip vortex cavitation modelling of propellers using CFD methods","authors":"Savas Sezen, M. Atlar","doi":"10.1080/09377255.2021.1927590","DOIUrl":"https://doi.org/10.1080/09377255.2021.1927590","url":null,"abstract":"ABSTRACT This study focuses on the investigation of cavitating flow around the benchmark INSEAN E779A model propeller with the main aim of further improving the computational efficiency of the tip vortex cavitation (TVC) modelling by using a commercial CFD solver. Also, the effects of various key computational parameters including, numerical modelling, grid size, timestep, water quality and boundary layer resolution, on the TVC formation and its extension in the propeller slipstream are investigated systematically. The numerical simulations are conducted in uniform and open water conditions using RANS, DES and LES solvers implemented in the commercial CFD code, Start CCM+. In order to achieve the aim of the study, an alternative and new Vorticity-based Adaptive Mesh Refinement (V-AMR) technique is introduced for enhanced modelling of the TVC on the blades and downstream. For the CFD modelling of cavitation, the Schneer Sauer cavitation model based on the reduced Rayleigh Plesset equation is used for the sheet, tip and hub vortex cavitation. The hydrodynamic results and cavity patterns are validated with the experimental data. The results show that the application of the V-AMR technique further improves the representation of the TVC with minimal increase in computational cost. However, the eddy viscosity at the propeller blade tips increases with applying the V-AMR technique using the RANS solver due to its inherent modelling errors for the solution of the flow inside the tip vortex. This consequently results in an insufficient extension of TVC in the propeller slipstream compared to the predictions by the DES and LES based numerical solvers. Also, the evolution of the TVC is found to be sensitive to the boundary layer resolution when the standard RANS solver is used. The study will help to widen further applications of the CFD methods involving TVC, particularly for propeller induced underwater noise prediction and analysis.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1927590","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46447586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Validation of added resistance in waves by tank tests and sea trial data 通过水箱试验和海试数据验证波浪中附加阻力

IF 2.2

Ship Technology Research Pub Date : 2021-05-12 DOI: 10.1080/09377255.2021.1925047

M. Tsujimoto, H. Yasukawa, Kotaku Yamamoto, Tae-il Lee

引用次数: 3

Challenges when creating a cohesive digital twin ship: a data modelling perspective 创建内聚数字孪生船时的挑战:数据建模视角

IF 2.2

Ship Technology Research Pub Date : 2021-05-04 DOI: 10.1080/09377255.2020.1815140

Í. A. Fonseca, H. Gaspar

引用次数: 29

Residual load-carrying capacity of stiffened panels with cracks under uniaxial tension loading considering crack propagation 考虑裂纹扩展的单轴拉伸加筋板的残余承载力

IF 2.2

Ship Technology Research Pub Date : 2021-04-08 DOI: 10.1080/09377255.2021.1904733

P. Fei, Zhang Yuelin, Mu Jinlei, Min Shao-song

引用次数: 2

A framework for rapid virtual prototyping: a case study with the Gunnerus research vessel 快速虚拟原型的框架:以Gunnerus研究船为例研究

IF 2.2

Ship Technology Research Pub Date : 2021-03-23 DOI: 10.1080/09377255.2021.1903128

P. Major, R. Zghyer, Houxiang Zhang, H. P. Hildre

{"title":"A framework for rapid virtual prototyping: a case study with the Gunnerus research vessel","authors":"P. Major, R. Zghyer, Houxiang Zhang, H. P. Hildre","doi":"10.1080/09377255.2021.1903128","DOIUrl":"https://doi.org/10.1080/09377255.2021.1903128","url":null,"abstract":"ABSTRACT Virtual prototypes (VPs) are digital models that mock-up existing or conceptual systems' behaviour. In offshore operations, VPs find usages in design, proof of concept for new equipment or method, control system testing, procedure planning, and expert crew training. Moreover, VP can be used in full mission simulators with crews of maritime and offshore engineers, in which case they integrate with control systems such as handles and dynamic positioning systems. Putting the human in the loop sets high requirements for the fidelity of the visual 3D-models and the mathematical models' validity. VPs are thus time-consuming to create and difficult to validate, even based on an existing offshore system. This paper presents an innovative framework for rapid virtual prototyping of ships for hardware and human in the loop simulations and validates the results with data gathered in a sea trial performed on a research vessel, with satisfying results for position keeping. Abbreviations: CLI, Command line interpreter; DP, Dynamic positioning system: ship equipment used to maintain position and heading; DM, Damping matrix; Force FBK, Force Feedback Thruster1; HIL, Hardware in the loop; HITL, Human in the loop; JNI, Java native interface; LC, Loading condition; RAO, Response amplitude operator; RPM, Revolutions per minute; RPM FBK, RPM Feedback Thruster2/3 (Main/Azimuth); SCM, Source code management system; SOG, Speed over ground; VP, Virtual prototyping/prototype; VST, Virtual sea trial; sea trial performed in a simulation","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1903128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45822038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

The influence of the propeller loading on the thrust deduction fraction 螺旋桨载荷对减推率的影响

IF 2.2

Ship Technology Research Pub Date : 2021-03-04 DOI: 10.1080/09377255.2021.1892934

Simone Saettone, B. Taskar, S. Steen, P. Andersen

引用次数: 3

Effects of nearshore wave reflections on the behaviour of an axe bow trimaran hull 近岸波浪反射对斧弓三体船船体性能的影响

IF 2.2

Ship Technology Research Pub Date : 2021-02-25 DOI: 10.1080/09377255.2021.1892906

Christopher Lewis McGibbon, Md Jahir Rizvi

引用次数: 0

An investigation of scale effects on marine propeller under cavitating and non-cavitating conditions 船用螺旋桨在空化和非空化条件下的尺度效应研究

IF 2.2

Ship Technology Research Pub Date : 2021-02-16 DOI: 10.1080/09377255.2021.1883800

A. Soydan, S. Bal

引用次数: 5

Manoeuvring prediction of a container ship in shallow water using numerical planar motion mechanism 基于数值平面运动机制的集装箱船浅水操纵预测

IF 2.2

Ship Technology Research Pub Date : 2021-02-16 DOI: 10.1080/09377255.2021.1883799

Akhil Balagopalan, P. Krishnankutty

引用次数: 3

Condition assessment of ship structure using robot assisted 3D-reconstruction 机器人辅助三维重建舰船结构状态评估

IF 2.2

Ship Technology Research Pub Date : 2021-01-18 DOI: 10.1080/09377255.2021.1872219

Faisal Mehmood Shah, T. Gaggero, M. Gaiotti, C. Rizzo

{"title":"Condition assessment of ship structure using robot assisted 3D-reconstruction","authors":"Faisal Mehmood Shah, T. Gaggero, M. Gaiotti, C. Rizzo","doi":"10.1080/09377255.2021.1872219","DOIUrl":"https://doi.org/10.1080/09377255.2021.1872219","url":null,"abstract":"ABSTRACT Ships condition is assessed regularly to maintain safety. Traditionally, structural integrity assessment is performed by surveyors, requiring complex and time-consuming operations to accessany ship space. Imagery based, three-dimensional (3D) reconstruction of structures is a new area obtaining considerable interest. It can provide low-cost, less disruptive and safer inspection approach. In this study, alternative technologies to generate 3D models, based on photos, are explored. The aim is to highlight how human made ship survey can be improved using robotics technology. A procedure for 3D reconstruction combining photogrammetry/videogrammetry and computer vision techniques is developed, providing an alternative to ease vessel inspections. Moreover, effect of pre-processing image datasets, aimed at improving the performance of 3D reconstruction, is investigated. An efficient image pre-processing pipeline based on computer vision algorithms for colour enhancement, shadow removal and image blurriness is presented. This study can help in effective and reliable decision-making process, due to its user-friendliness and cost effectiveness, mainly for cargo holds requiring frequent assessment because of cargo operations induced damages.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1872219","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43774913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5