{"title":"Zero Leak Management of New Energy Ammonia - \"Don't Leak Safety\"; Preventing Leakage and Ensuring Safety and Security","authors":"Satomi Takahashi, Hirohumi Zushi, Yoshihisa Deguchi, Syogo Hayami, Kousuke Tanaka","doi":"10.5988/jime.58.708","DOIUrl":"https://doi.org/10.5988/jime.58.708","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Safety Evaluation for Autonomous Ship Technologies","authors":"Tomoaki Yamada","doi":"10.5988/jime.58.646","DOIUrl":"https://doi.org/10.5988/jime.58.646","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"舶用4ストロークアンモニア燃料機関の開発","authors":"Tetsuya Tagai","doi":"10.5988/jime.58.679","DOIUrl":"https://doi.org/10.5988/jime.58.679","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Technologies to Effectively Utilize (Use as Fuel and Reuse) Ammonia and Enable Detoxification","authors":"Naohito Kikuchi, Madoka Kawai, Jun Hidari","doi":"10.5988/jime.58.718","DOIUrl":"https://doi.org/10.5988/jime.58.718","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The tightening method using impact wrenches is used rather frequently to clamp bolted joints requiring high workability. The tightening torque is applied in the form of impact forces generated by a rotating hammer, which is powered by compressed air, hydraulic force or electric power. The primary advantage of impact wrenches is that the tightening operation can be completed in a short time. However, the accuracy of the generated bolt force is not so high, because of the complicated mechanical behavior caused by the action of impact forces. In this paper, the tightening process of bolted joints by use of impact wrenches is studied from the mechanical point of view, and the relationship between the nut rotation angle and the repeat count of impact forces is formulated. Based on the foregoing results, a practical tightening guideline is proposed by considering the effects of joint stiffness and impact friction coefficient that vary in the progress of the tightening operation.
{"title":"インパクトレンチによるボルト締め付けの力学特性","authors":"Toshimichi Fukuoka","doi":"10.5988/jime.58.724","DOIUrl":"https://doi.org/10.5988/jime.58.724","url":null,"abstract":"The tightening method using impact wrenches is used rather frequently to clamp bolted joints requiring high workability. The tightening torque is applied in the form of impact forces generated by a rotating hammer, which is powered by compressed air, hydraulic force or electric power. The primary advantage of impact wrenches is that the tightening operation can be completed in a short time. However, the accuracy of the generated bolt force is not so high, because of the complicated mechanical behavior caused by the action of impact forces. In this paper, the tightening process of bolted joints by use of impact wrenches is studied from the mechanical point of view, and the relationship between the nut rotation angle and the repeat count of impact forces is formulated. Based on the foregoing results, a practical tightening guideline is proposed by considering the effects of joint stiffness and impact friction coefficient that vary in the progress of the tightening operation.","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Putu Hangga Nan Prayoga, Shinichi Inoue, Hideaki Nomura, Takumi Nakamura
{"title":"Framework for Designing Reliable Propulsion Systems of Manned-autonomous Vessels","authors":"Putu Hangga Nan Prayoga, Shinichi Inoue, Hideaki Nomura, Takumi Nakamura","doi":"10.5988/jime.58.651","DOIUrl":"https://doi.org/10.5988/jime.58.651","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"シンポジウム「自動運航船開発の最新動向」の司会をして","authors":"Etsuro Shimizu","doi":"10.5988/jime.58.607","DOIUrl":"https://doi.org/10.5988/jime.58.607","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Current Status of Developmenｔ on Maritime Autonomous Ship Systems (June 2023)","authors":"Etsuro Shimizu, Ayako Umeda","doi":"10.5988/jime.58.611","DOIUrl":"https://doi.org/10.5988/jime.58.611","url":null,"abstract":"","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heat transfer involved with non-Newtonian fluid flows is encountered in material processing for the shipbuilding as well as other heavy machinery industries. In such applications particularly for drawing, extrusion, coating, etc., the thermal procedures involve the combined form of Couette and Poiseuille flows as the axially moving cylindrical rod continuously exchanges heat with the surrounding environment. In this numerical study, using the fully developed laminar velocity field obtained by applying the modified power-law model, the effects of viscous dissipation and fluid axial heat conduction on thermally developing heat transfer of non-Newtonian fluids flowing in a concentric annulus with a moving core are investigated for the thermal boundary conditions of constant temperature and/or constant heat flux at the cylinder walls. The flow temperature distribution is obtained for an axially infinite extent by solving the elliptic type energy equation and the solution is based on a coordinate transformation.
{"title":"Viscous Dissipation and Fluid Axial Heat Conduction Effect on the Heat Transfer to a Laminar Non-Newtonian Fluid Flow in Cylindrical Annular Duct with an Axially Moving Core","authors":"Ganbat Davaa, Odgerel Jambal, Hiroyuki Nagai","doi":"10.5988/jime.58.731","DOIUrl":"https://doi.org/10.5988/jime.58.731","url":null,"abstract":"Heat transfer involved with non-Newtonian fluid flows is encountered in material processing for the shipbuilding as well as other heavy machinery industries. In such applications particularly for drawing, extrusion, coating, etc., the thermal procedures involve the combined form of Couette and Poiseuille flows as the axially moving cylindrical rod continuously exchanges heat with the surrounding environment. In this numerical study, using the fully developed laminar velocity field obtained by applying the modified power-law model, the effects of viscous dissipation and fluid axial heat conduction on thermally developing heat transfer of non-Newtonian fluids flowing in a concentric annulus with a moving core are investigated for the thermal boundary conditions of constant temperature and/or constant heat flux at the cylinder walls. The flow temperature distribution is obtained for an axially infinite extent by solving the elliptic type energy equation and the solution is based on a coordinate transformation.","PeriodicalId":50152,"journal":{"name":"Journal of Marine Engineering and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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