S. Yamasaki, T. Kawamura, T. Mizojiri, S. Kataoka, A. Okazaki, Y. Ishihara
{"title":"A Study on the Optimum Propeller at Full Scale Condition, Part2: Effect of the Reynolds Number on the Optimum Diameter and Optimum Efficiency of Propellers with Laminar Flow Blade Section","authors":"S. Yamasaki, T. Kawamura, T. Mizojiri, S. Kataoka, A. Okazaki, Y. Ishihara","doi":"10.2534/jjasnaoe.29.19","DOIUrl":"https://doi.org/10.2534/jjasnaoe.29.19","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"85 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121156708","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}
K. Kume, Sebastian Bielicki, Hiroshi Kobayashi, Hiroki Ohba
The wind forces acting on a ship are normalized using the air density, the projected area of the ship and the representative wind velocity. In this regard, the authors have presented that the use of height average wind velocities (HAWV) can reduce the effect of differences in wind profiles on wind force coefficients. In this study, the results of wind forces calculations carried out by several companies and institutes using flow solvers available for each participant on two types of ships were compared, and show the effectiveness of HAWV. The CFD calculations were performed with different wind profiles depending on the participants of the calculation. Although the difference of calculation conditions of each simulation causes the difference of profiles of inflow velocity and the wind forces acting on the ship, the HAWV have been proposed as an appropriate, representative wind velocities for the normalization which can reduce the influence of the difference of the wind profiles by considering the concept of kinetic energy. The normalization with the HAWV provides flexibility in CFD calculation settings and in the same in modeling wind profile demanded for estimation of the wind forces. This approach also expands the possibilities of available CFD tools. In addition, the calculation results with various configurations, such as differences in boundary conditions set in computational domain, mesh types and considerations of flow unsteadiness, were non-dimensionalized by HAWV method with enough accuracy for practical use. It indicates that the above variations might be the options for the computation set up.
{"title":"Validation of dimensionless method using height average wind velocity for wind forces","authors":"K. Kume, Sebastian Bielicki, Hiroshi Kobayashi, Hiroki Ohba","doi":"10.2534/jjasnaoe.31.39","DOIUrl":"https://doi.org/10.2534/jjasnaoe.31.39","url":null,"abstract":"The wind forces acting on a ship are normalized using the air density, the projected area of the ship and the representative wind velocity. In this regard, the authors have presented that the use of height average wind velocities (HAWV) can reduce the effect of differences in wind profiles on wind force coefficients. In this study, the results of wind forces calculations carried out by several companies and institutes using flow solvers available for each participant on two types of ships were compared, and show the effectiveness of HAWV. The CFD calculations were performed with different wind profiles depending on the participants of the calculation. Although the difference of calculation conditions of each simulation causes the difference of profiles of inflow velocity and the wind forces acting on the ship, the HAWV have been proposed as an appropriate, representative wind velocities for the normalization which can reduce the influence of the difference of the wind profiles by considering the concept of kinetic energy. The normalization with the HAWV provides flexibility in CFD calculation settings and in the same in modeling wind profile demanded for estimation of the wind forces. This approach also expands the possibilities of available CFD tools. In addition, the calculation results with various configurations, such as differences in boundary conditions set in computational domain, mesh types and considerations of flow unsteadiness, were non-dimensionalized by HAWV method with enough accuracy for practical use. It indicates that the above variations might be the options for the computation set up.","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121347335","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}
{"title":"Development of DEM Model of Methane-Hydrate Bearing Sand Layer","authors":"Yosuke Sawano, Toru Sato, N. Tenma","doi":"10.2534/jjasnaoe.34.109","DOIUrl":"https://doi.org/10.2534/jjasnaoe.34.109","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126179387","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}
Tomoki Taniguchi, T. Fujiwara, Jun Umeda, T. Nimura, T. Katayama
{"title":"Motion Evaluation of Floating Point Absorber-type Wave Energy Converter by Kane's Equation","authors":"Tomoki Taniguchi, T. Fujiwara, Jun Umeda, T. Nimura, T. Katayama","doi":"10.2534/jjasnaoe.35.65","DOIUrl":"https://doi.org/10.2534/jjasnaoe.35.65","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127353400","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}
{"title":"Experimental Study on Added Resistance of Very Large Blunt Ship Running in Beam Seas","authors":"H. Yoshida, H. Orihara, K. Takagishi","doi":"10.2534/jjasnaoe.29.51","DOIUrl":"https://doi.org/10.2534/jjasnaoe.29.51","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133536779","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}
K. Hamada, Tokimasa Hiraki, Motochika Nagano, Yoshimichi Sasaki, Masashi Ozaki
{"title":"The Development of SPEEDS (Smart Platform of Enhanced Engineering Data for Shipping and Shipbuilding) To Realize the Innovative Use of Ship 3D Data","authors":"K. Hamada, Tokimasa Hiraki, Motochika Nagano, Yoshimichi Sasaki, Masashi Ozaki","doi":"10.2534/jjasnaoe.34.171","DOIUrl":"https://doi.org/10.2534/jjasnaoe.34.171","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129274219","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}
{"title":"Inspection of the Drawings of Schooner Heda Constructed at the End of the Era of Tokugawa Shogunate","authors":"Tugukiyo Hirayama","doi":"10.2534/jjasnaoe.36.117","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.117","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123277213","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}
{"title":"A Fundamental Study on the Potential of AI Prediction in Control Force Estimation to Maximize Power Generation of PA-WECs in Irregular Waves","authors":"M. Murai, Sho Sakamoto","doi":"10.2534/jjasnaoe.35.55","DOIUrl":"https://doi.org/10.2534/jjasnaoe.35.55","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124803547","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}
{"title":"Estimation of Wave Loads based on Two-dimensional Wave Spectrum by Hindcast.","authors":"M. Oka, Chong Ma, Xi Chen","doi":"10.2534/jjasnaoe.36.125","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.125","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125009389","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}
{"title":"Mathematic Modeling and Control of Underwater Cable-Driven Parallel Robot","authors":"Katutoshi Kodama, Akihiro Morinaga, Ikuo Yamamoto","doi":"10.2534/jjasnaoe.36.53","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.53","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129897500","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}
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