{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282679471497728.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.14856/kansaiks.167.0_39"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"1917573"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/1917573"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I1917573"}},{"identifier":{"@type":"NAID","@value":"110003880674"}}],"dc:title":[{"@language":"ja","@value":"伴流中におけるプロペラの効率に間する二, 三の考察"},{"@language":"en","@value":"On the Efficiency of a Propeller behind a Ship"},{"@value":"伴流中におけるプロペラの効率に関する二,三の考察"},{"@language":"ja-Kana","@value":"ハンリュウチュウ ニ オケル プロペラ ノ コウリツ ニ カンスル ニ サン"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"Two problems relating to the efficiency of a propeller behind a ship are discussed by the simple momentum theory. The conclusions thus obtained are as follows : 1. Maximum ideal efficiency of a propeller behind a ship can be over 1.0 and is given by η_<max>=1/(1-(W_f)/2). where η_<max> : maximum efficiency W_f=1-V_a/V : frictional wake coefficient V : velocity of the uniform stream V_a : propeller advance speed In the ideal condition, thrust deduction factor (t) is related to the wake coefficients by t=(W_p)/(1-(W_f)/2). where W_p : potential wake coefficient 2. Non-uniformity effect of the ship's wake upon the propeller efficiency can be estimated by modified relative rotative efficiency (η'_R), which is defined by making use of the nominal wake coefficient (W_n). η'_R = (NQ)/(N_0Q_0) where N, Q : propeller r.p.m. and torque in the non-uniform stream, whose mean velocity equals to V(1-W_n). N_0, Q_0 : propeller r.p.m. and torque in the uniform stream whose velocity equals to V(1-W_n), to produce the same thrust as the one in the case of N and Q."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410001204056657792","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000020816736"},{"@type":"NRID","@value":"9000365004945"},{"@type":"NRID","@value":"9000005495257"},{"@type":"NRID","@value":"9000020809312"},{"@type":"NRID","@value":"9000254538944"},{"@type":"NRID","@value":"9000005506220"},{"@type":"NRID","@value":"9000020853386"},{"@type":"NRID","@value":"9000020435825"},{"@type":"NRID","@value":"9000020821216"},{"@type":"NRID","@value":"9000020866108"},{"@type":"NRID","@value":"9000020816622"},{"@type":"NRID","@value":"9000020853410"},{"@type":"NRID","@value":"9000021751801"},{"@type":"NRID","@value":"9000020826649"},{"@type":"NRID","@value":"9000020824488"},{"@type":"NRID","@value":"9000254538718"},{"@type":"NRID","@value":"9000021756902"},{"@type":"NRID","@value":"9000020829741"},{"@type":"NRID","@value":"9000254538515"},{"@type":"NRID","@value":"9000020852719"},{"@type":"NRID","@value":"9000020519590"},{"@type":"NRID","@value":"9000020852763"},{"@type":"NRID","@value":"9000020795614"},{"@type":"NRID","@value":"9000254117816"}],"foaf:name":[{"@language":"ja","@value":"高木 又男"},{"@language":"en","@value":"TAKAGI Matao"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"日立造船(株)技術研究所"}]},{"@id":"https://cir.nii.ac.jp/crid/1410009221701104770","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000005503315"},{"@type":"NRID","@value":"9000005506988"},{"@type":"NRID","@value":"9000020830538"},{"@type":"NRID","@value":"9000020813992"},{"@type":"NRID","@value":"9000020852747"}],"foaf:name":[{"@language":"ja","@value":"北沢 孝宗"},{"@language":"en","@value":"KITAZAWA Takamune"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"日立造船(株)技術研究所"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03899101"},{"@type":"EISSN","@value":"2433104X"},{"@type":"NDL_BIB_ID","@value":"000000004391"},{"@type":"ISSN","@value":"03899101"},{"@type":"LISSN","@value":"03899101"},{"@type":"NCID","@value":"AN00349587"}],"prism:publicationName":[{"@language":"ja","@value":"関西造船協会誌"},{"@language":"en","@value":"Journal of the Kansai Society of Naval Architects, Japan"}],"dc:publisher":[{"@language":"en","@value":"The Japan Society of Naval Architects and Ocean Engineers"},{"@language":"ja","@value":"公益社団法人 日本船舶海洋工学会"}],"prism:publicationDate":"1977","prism:volume":"167","prism:number":"0","prism:startingPage":"39","prism:endingPage":"45"},"url":[{"@id":"http://id.ndl.go.jp/bib/1917573"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I1917573"}],"availableAt":"1977","dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2004171089"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I1917573"},{"@type":"CIA","@value":"110003880674"}]}