Ship Technology Research最新文献

Measurements of steady manoeuvring forces and moments over an axisymmetric body with appendages in a wind tunnel 在风洞中测量带附肢的轴对称物体上的稳定操纵力和力矩

IF 2.2

Ship Technology Research Pub Date : 2023-12-28 DOI: 10.1080/09377255.2023.2296740

Md. Kareem Khan, M. Korulla, Vishwanath Nagarajan, O. P. Sha

引用次数: 0

Practical ship afterbody optimization by multifidelity techniques 通过多保真技术优化实用船体

IF 2.2

Ship Technology Research Pub Date : 2023-11-21 DOI: 10.1080/09377255.2023.2275371

H. Raven, Joy Klinkenberg

引用次数: 0

Unsteady ship–bank interaction: a comparison between experimental and computational predictions 非定常船岸相互作用:实验与计算预测的比较

Ship Technology Research Pub Date : 2023-11-10 DOI: 10.1080/09377255.2023.2275372

G. Delefortrie, J. Verwilligen, C. Kochanowski, J. A. Pinkster, Z. M. Yuan, Y. H. Liu, M. Kastens, W. Van Hoydonck, H. J. M. Pinkster, E. Lataire

{"title":"Unsteady ship–bank interaction: a comparison between experimental and computational predictions","authors":"G. Delefortrie, J. Verwilligen, C. Kochanowski, J. A. Pinkster, Z. M. Yuan, Y. H. Liu, M. Kastens, W. Van Hoydonck, H. J. M. Pinkster, E. Lataire","doi":"10.1080/09377255.2023.2275372","DOIUrl":"https://doi.org/10.1080/09377255.2023.2275372","url":null,"abstract":"ABSTRACTA collaborative exercise is presented where different numerical methods were used to recreate the forces acting on a ship model while executing captive model tests along a channel which has an unsteady cross section (dock opening). Such a layout is typical for a harbour environment. The unsteady nature of the cross section leads to peak values in forces, sinkage and free surface deformations. Experimental tests were conducted by Flanders Hydraulics (with the co-operation of Ghent University). Numerical contributions involve three potential flow methods (Strathclyde University and Pinkster Marine Hydrodynamics) and one RANS method (Federal Waterways Engineering and Research Institute of Germany). All methods are capable of qualitatively predicting the water level variations and sinkage and trim of the vessel. RANS has a better capability of predicting the unsteady sway force and yaw moment acting on the ship including sinkage and trim, but it comes at a much higher computational cost.KEYWORDS: Unsteadyharbourbenchmarkhydrodynamicspotential flowRANSEFDship-bank Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"101 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135136267","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: 0

Active flow control applied to a ship rudder model 舰船方向舵模型的主动流动控制

Ship Technology Research Pub Date : 2023-11-01 DOI: 10.1080/09377255.2023.2275373

Matthias Fromm, Tobias Bestier, Sören Brüns, Jörn Kröger, Florian Kluwe, Alexander Hylla, Farhan Matin, Avraham “Avi” Seifert, Sven Grundmann

{"title":"Active flow control applied to a ship rudder model","authors":"Matthias Fromm, Tobias Bestier, Sören Brüns, Jörn Kröger, Florian Kluwe, Alexander Hylla, Farhan Matin, Avraham “Avi” Seifert, Sven Grundmann","doi":"10.1080/09377255.2023.2275373","DOIUrl":"https://doi.org/10.1080/09377255.2023.2275373","url":null,"abstract":"ABSTRACTThe improvement of the performance and efficiency of hydrodynamic control surfaces such as ship rudders is a long sought goal, given economic considerations and the ecological impact of the shipping sector. One major problem limiting the performance of rudders is flow separation at high deflection angles. In this paper, we address this problem using active flow control, a technique first proposed in aerodynamics. A small scale and a large-scale rudder model with realistic geometry were manufactured and equipped with an active flow control system employing the method of pulsed blowing. The actuation system was extensively characterized. Towing tank experiments were conducted up to a Reynolds number of 1.33×106. Data included force measurements for the large-scale model and flow field and force measurements for the small-scale model. The impact of the active control on the flow fields around the small-scale model was characterized. The delay of the flow separation towards a higher angle of attack, accompanied with an increase of the maximum lift forces, was demonstrated for both models.KEYWORDS: Active flow controlship rudderseparation controlfluidic oscillatortowing tankparticle image velocimetry AcknowledgmentsWe express our thanks to Johannes Will for fruitful discussions on the particulars of rudder design.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis project was supported by the German Federal Ministry of Economic Affairs and Climate Action [grant number 03SX496E].","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"82 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135272867","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: 0

A new power prediction method using ship in-service data: a case study on a general cargo ship 一种利用船舶在役数据进行功率预测的新方法——以某普通货船为例

Ship Technology Research Pub Date : 2023-11-01 DOI: 10.1080/09377255.2023.2275378

Ehsan Esmailian, Young-Rong Kim, Sverre Steen, Kourosh Koushan

引用次数: 0

Interactive modelling of fair ship hulls with B-spline surfaces avoiding gaps and discontinuities 避免间隙和不连续的b样条曲面公平船体的交互建模

Ship Technology Research Pub Date : 2023-11-01 DOI: 10.1080/09377255.2023.2270341

L. Birk

引用次数: 0

Ship hull optimization – past, present, prospects 船舶船体优化-过去，现在，前景

Ship Technology Research Pub Date : 2023-11-01 DOI: 10.1080/09377255.2023.2271710

Volker Bertram, Justus Heimann, Karsten Hochkirch

引用次数: 0

Design-space dimensionality reduction in global optimization of functional surfaces: recent developments and way forward 设计空间降维的整体优化的功能表面:最近的发展和前进的道路

Ship Technology Research Pub Date : 2023-10-26 DOI: 10.1080/09377255.2023.2270309

Matteo Diez, Andrea Serani

{"title":"Design-space dimensionality reduction in global optimization of functional surfaces: recent developments and way forward","authors":"Matteo Diez, Andrea Serani","doi":"10.1080/09377255.2023.2270309","DOIUrl":"https://doi.org/10.1080/09377255.2023.2270309","url":null,"abstract":"In shape optimization of complex industrial products (such as, but not limited to, hull forms, rudder and appendages, propellers), there exists an inherent similarity between global optimization (GO) and uncertainty quantification (UQ): they rely on an extensive exploration of the design and operational spaces, respectively; often, they need local refinements to ensure accurate identification of optimal solutions or probability density regions (such as distribution tails), respectively; they both are dramatically affected by the curse of dimensionality as GO and UQ algorithms' complexity and especially computational cost rapidly increase with the problem dimension. Therefore, there exists a natural ground for transferring dimensionality reduction methods from UQ to GO. These enable the efficient exploration of large design spaces in shape optimization, which, in turn, enable global optimization (possibly in a multidisciplinary and stochastic setting). The paper reviews and discusses recent techniques for design-space dimensionality reduction in shape optimization, based on the Karhunen-Loève expansion (equivalent to proper orthogonal decomposition and, at the discrete level, principal component analysis). An example is shown and discussed for the hydrodynamic optimization of a ship hull.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"170 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136381902","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: 0

The resistance of a trans-critically accelerating ship in shallow water 跨临界加速船在浅水中的阻力

Ship Technology Research Pub Date : 2023-09-13 DOI: 10.1080/09377255.2023.2252232

Momchil Terziev, Yihan Liu, Zhiming Yuan, Atilla Incecik

引用次数: 0

An investigation into the gate rudder system design for propulsive performance using design of experiment method 用实验设计方法研究门舵系统的推进性能

IF 2.2

Ship Technology Research Pub Date : 2023-09-04 DOI: 10.1080/09377255.2023.2248721

A. Gürkan, U. Ünal, B. Aktas, M. Atlar

引用次数: 0