International Journal of Naval Architecture and Ocean Engineering最新文献_第10页

Three-dimensional study on the interaction between a container ship and freak waves in beam sea 集装箱船与波束海畸形浪相互作用的三维研究

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2022.100509

Jiaqian Wang , Hao Qin , Zhe Hu , Lin Mu

引用次数: 1

Investigation of the effect of adaptive characteristics on non-cavitating noise for flexible propeller in non-uniform flow via the fluid-structure interaction model 基于流固耦合模型的柔性螺旋桨非均匀流动自适应特性对非空化噪声的影响

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100541

Yo-Seb Choi , Suk-Yoon Hong , Jee-Hun Song

{"title":"Investigation of the effect of adaptive characteristics on non-cavitating noise for flexible propeller in non-uniform flow via the fluid-structure interaction model","authors":"Yo-Seb Choi , Suk-Yoon Hong , Jee-Hun Song","doi":"10.1016/j.ijnaoe.2023.100541","DOIUrl":"10.1016/j.ijnaoe.2023.100541","url":null,"abstract":"<div><p>When constructing a low-noise submarine, it is crucial to consider the non-cavitating noise from the propeller. Non-cavitating noise reduction is crucial for submarine stealth and survivability. Recently, several studies have been conducted on the use of flexible propellers as a means of reducing non-cavitating noise. However, there are no studies on the use of flexible propellers with adaptive characteristics to reduce noise in wake fields. Thus, this study investigated the noise reduction effect of adaptive characteristics on non-cavitating noise for the flexible propeller in the wake field. Numerical investigations on the main propeller variables were conducted based on the proposed procedure using fluid-structure interaction and acoustic analysis models. The results were compared with those of rigid propellers to determine the possible reasons for noise reduction. Finally, the acoustic analysis results of the flexible propeller were compared with those of the rigid propeller to reveal the effectiveness of the adaptive characteristics.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100541"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44245782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Method for pipe routing using the expert system and the heuristic pathfinding algorithm in shipbuilding 基于专家系统和启发式寻路算法的船舶管道布线方法

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100533

Jisang Ha , Myung-Il Roh , Ki-Su Kim , Jin-Hyeok Kim

{"title":"Method for pipe routing using the expert system and the heuristic pathfinding algorithm in shipbuilding","authors":"Jisang Ha , Myung-Il Roh , Ki-Su Kim , Jin-Hyeok Kim","doi":"10.1016/j.ijnaoe.2023.100533","DOIUrl":"10.1016/j.ijnaoe.2023.100533","url":null,"abstract":"<div><p>Pipe routing during the design process of a ship depends on the design experience or knowledge of experts. In this study, an expert system that can systematize expert knowledge was constructed to enhance the design of a ship's pipe routing, which relies on experts. In addition, a method for pipe routing using a pathfinding algorithm was proposed. An arrangement template model (a type of data structure for pipe routing) and an arrangement evaluation model (a type of expert system) were proposed to systematically concretize and computerize expert knowledge. To review several alternatives for pipe routing in a short time and derive an optimal alternative, an optimization technique was combined with an expert system, and the optimization problem was mathematically formulated. That is, the design alternatives for pipe routing were evaluated using the arrangement evaluation model, and the results were used as one of the objective functions of the optimization problem for optimal pipe routing. To verify the proposed method, examples were selected, pipe routing was performed on the examples, and the results were compared with those of the manual design. As a result, an improved pipe routing could be obtained using the proposed method.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100533"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44406615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational analysis of strut effects on a BB2 submarine at drift angle 0, 6, and 12° BB2型潜艇在0°、6°和12°漂移角下支撑效应的计算分析

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100555

Junyoung Park , Woochan Seok

{"title":"Computational analysis of strut effects on a BB2 submarine at drift angle 0, 6, and 12°","authors":"Junyoung Park , Woochan Seok","doi":"10.1016/j.ijnaoe.2023.100555","DOIUrl":"https://doi.org/10.1016/j.ijnaoe.2023.100555","url":null,"abstract":"<div><p>Struts are attached to a submarine to maintain its submerged depth when conducting the model tests. While previous studies have mentioned that the attachment of the struts has a negligible effect on the performance of a submarine, it is difficult to find studies that clearly explain the effects of the struts. The present study examines the effect of struts with a circular cross-section on the resistance and propulsion performances of a submarine under both straight-ahead (β = 0°) and static-drift (β = 6° and 12°) conditions. For this analysis, the open-source computational fluid dynamics (CFD) toolkit OpenFOAM was utilized. A generic submarine Joubert BB2 was selected as a test model, which was modified by the Maritime Research Institute Netherlands (MARIN). Analyses of resistance were conducted in straight-ahead and static-drift conditions, and the flow characteristics such as pressure, velocity, vorticity, and turbulent kinetic energy were compared to identify differences caused by the struts on the BB2 submarine. The results showed that as the drift angle increased, the struts had a smaller effect on the submarine along the hull to the propeller plane. From the results, it was predicted that the effect of the struts should be considered during the design process for the submarine.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100555"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678223000444/pdfft?md5=4607ac4899dafb906e6141c736e8052b&pid=1-s2.0-S2092678223000444-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91730028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility study of shell element-based elastic FE approach for welding-induced thermal distortion prediction in HDPE welded structures 基于壳单元的弹性有限元法预测HDPE焊接结构焊接热变形的可行性研究

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100559

Jae-Min Lee

{"title":"Feasibility study of shell element-based elastic FE approach for welding-induced thermal distortion prediction in HDPE welded structures","authors":"Jae-Min Lee","doi":"10.1016/j.ijnaoe.2023.100559","DOIUrl":"10.1016/j.ijnaoe.2023.100559","url":null,"abstract":"<div><p>High-density polyethylene (HDPE) is considered an eco-friendly material for boat construction worldwide. However, managing thermal distortion in HDPE welding is challenging, impacting productivity. Traditional steel shipbuilding has established methods to predict welding-induced thermal distortion, but HDPE lacks comprehensive studies and standards. This research explores applying the elastic Finite Element (FE) approach, commonly used in steel structures, to HDPE welding. The elastic FE approach simplifies complex welding simulations, enabling its use in large structures like ship hulls. Our research assesses whether HDPE welded specimens exhibit similar distortion patterns to conventional welded structures and whether consistent parameters yield similar thermal distortion. Alignment between our FE analysis, based on specimen data, and experimental results validates the feasibility of using the elastic FE approach to predict HDPE thermal distortion. This study suggests it as a practical method to enhance HDPE boat manufacturing productivity.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100559"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678223000481/pdfft?md5=5749467e3808e352d2942141de53b94e&pid=1-s2.0-S2092678223000481-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical study of performance of flat and perforated radiant heat shields for offshore structures 海上结构用平板和穿孔辐射隔热板性能的数值研究

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2022.100491

Gang Nam Lee , Kwang Hyo Jung , Hyung Jun Kim , Bong Ju Kim , Dae Kyeom Park , Il-Ryong Park

{"title":"Numerical study of performance of flat and perforated radiant heat shields for offshore structures","authors":"Gang Nam Lee , Kwang Hyo Jung , Hyung Jun Kim , Bong Ju Kim , Dae Kyeom Park , Il-Ryong Park","doi":"10.1016/j.ijnaoe.2022.100491","DOIUrl":"10.1016/j.ijnaoe.2022.100491","url":null,"abstract":"<div><p>Heat shields are an essential safety facility on offshore structures to protect the workers and the equipment on deck from the violent radiant heat flux and the high temperatures of the flare tower. In this study, a series of Computational Fluid Dynamics (CFD) simulations were performed to investigate the thermal characteristics of radiant heat shields on offshore structures in order to obtain a precise prediction of those reduction performances on heat flux and temperature. CFD methodologies for the radiant heat transfer simulation were suggested for grid, iteration, and time step with physical modelling methods of heat transfer considering the convection effect and the heat flux sensor, including the scaling method for the simulation of a perforated heat shield. The reduction ratios of the heat flux and temperature were obtained for the case without the heat shield and for a flat and perforated heat shield under the heat source of 25 kW/m<sup>2</sup> for various distances from the heat shield, and the results were compared with the experimental results. Analytical estimation methods were included in the study of the radiant heat flux and temperature, and an empirical formula was provided for the performance of the heat shields based on the CFD results.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100491"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44312519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study on ammonia and liquid hydrogen transportation costs in comparison to LNG 氨和液氢运输成本与液化天然气的比较研究

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100523

Youngjun You , Sewon Kim , Joon Chae Lee

{"title":"Comparative study on ammonia and liquid hydrogen transportation costs in comparison to LNG","authors":"Youngjun You , Sewon Kim , Joon Chae Lee","doi":"10.1016/j.ijnaoe.2023.100523","DOIUrl":"10.1016/j.ijnaoe.2023.100523","url":null,"abstract":"<div><p>Since ammonia and liquid hydrogen are the optional future shipping cargo and fuels, the applicability was crucial using the current technologies and expectations. Existing studies for the economic feasibility of the energies had limitations: empirical evaluation with assumptions and insufficiency related to causality. A distorted estimation can result in failure of decision-making or policy in terms of future energy. The present study aimed to evaluate the transportation costs of future energy including ammonia and liquid hydrogen in comparison to LNG for overcoming the limitations. An integrated mathematical model was applied to the investigation for economic feasibility. The transportation costs of the chosen energies were evaluated for the given transportation plan considering key factors: ship speed, BOR, and transportation plan. The transportation costs at the design speed for LNG and liquid hydrogen were approximately 55% and 80% of that for ammonia without considering the social cost due to CO<sub>2</sub> emission. Although ammonia was the most expensive energy for transportation, ammonia could be an effective alternative due to insensitivity to the transportation plan. If the social cost was taken into account, liquid hydrogen already gained competitiveness in comparison to LNG. The advantage of liquid hydrogen was maximized for higher speed where more BOG was injected into main engines.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100523"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43732537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparative analysis of the thermodynamic performances of solid oxide fuel cell–gas turbine integrated systems for marine vessels using ammonia and hydrogen as fuels 以氨和氢为燃料的船用固体氧化物燃料电池-燃气轮机集成系统热力学性能的比较分析

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100524

Bo Rim Ryu , Phan Anh Duong , Hokeun Kang

{"title":"Comparative analysis of the thermodynamic performances of solid oxide fuel cell–gas turbine integrated systems for marine vessels using ammonia and hydrogen as fuels","authors":"Bo Rim Ryu , Phan Anh Duong , Hokeun Kang","doi":"10.1016/j.ijnaoe.2023.100524","DOIUrl":"10.1016/j.ijnaoe.2023.100524","url":null,"abstract":"<div><p>To mitigate environmental issues and implement energy management strategies, hydrogen is emerging as the most promising and sustainable energy source to help achieve decarbonization targets and meet world energy demands. However, hydrogen poses significant storage and transportation challenges due to its low volumetric and gravimetric density. Hence, ammonia is a potential candidate for a hydrogen storage medium because it contains 17.65% hydrogen by weight, and its volumetric hydrogen density is 45% higher than that of liquid hydrogen. In the maritime sector, these available fuels of ammonia and hydrogen are utilized via internal combustion engines, fuel cells, and gas turbines, which are employed on board ships. This study investigates the possibility of using ammonia and hydrogen as fuels for Solid Oxide Fuel Cells (SOFCs). A combined SOFC-Gas Turbine (GT) system was proposed to generate power for marine propulsion plants. This system was designed and modeled with support from Aspen HYSYS V.12.1. Thermodynamics performances of the proposed system were analyzed using the first and second laws of thermodynamics. The energy efficiencies of direct ammonia and hydrogen SOFCs were 60.96 and 64.46%, respectively. The energy efficiencies of the combined systems increased by 12.37 and 13.97% when using ammonia and hydrogen as fuels, respectively, compared with that of single SOFC systems. The exergy destruction of the primary components with each fuel was examined. Furthermore, a parametric study was performed to select the most suitable fuel utilization factor for the system. This analysis proved that ammonia has the potential as a hydrogen carrier and that waste heat recovery is an effective method to improve the thermodynamic performance of an SOFC system.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100524"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42203421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Experimental datasets of green water phenomenon on rectangular structure 矩形结构上绿水现象实验数据集

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100518

Gang Nam Lee , Kwang Hyo Jung , Sung Bu Suh , Jaeyong Lee

引用次数: 0

Fatigue assessment for FPSO hawsers 浮式生产储油船缆绳的疲劳评估

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI: 10.1016/j.ijnaoe.2023.100540

Vladimir Yakimov , Oleg Gaidai , Fang Wang , Xiaosen Xu , Yuhao Niu , Wang Kelin

{"title":"Fatigue assessment for FPSO hawsers","authors":"Vladimir Yakimov , Oleg Gaidai , Fang Wang , Xiaosen Xu , Yuhao Niu , Wang Kelin","doi":"10.1016/j.ijnaoe.2023.100540","DOIUrl":"10.1016/j.ijnaoe.2023.100540","url":null,"abstract":"<div><p>Floating Production Storage and Offloading Unit (FPSO) is designed to produce, store and transport hydrocarbon products. FPSO's hawsers may be exposed to both extreme and fatigue loads during operations. Hence prediction of their fatigue life is important for operational safety. During some unloading operations, consistent hawser tensions could develop as a result of internal friction in nylon ropes, casing wear and accumulated fatigue damage. Methodology, suggested in this study, may be effectively employed at the vessel design phase, when optimizing vessel parameters, reducing potential FPSO hawser tension fatigue damage. This study aims to contribute to development of novel fatigue assessment approaches, in order to use limited available datasets more effectively. Stresses occurring within FPSO hawsers have been modelled, using actual in situ environmental conditions. Simulated continuous stress time series were used as input for the rainflow counting analysis; the cumulative fatigue damage was then evaluated. Note on experimental validation has been provided.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"15 ","pages":"Article 100540"},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45916369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8