{"created":"2024-03-01T07:57:12.773451+00:00","id":2000060,"links":{},"metadata":{"_buckets":{"deposit":"8fb76a88-f6a1-4a0b-b5ee-fb1a332059be"},"_deposit":{"created_by":12,"id":"2000060","owner":"12","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"2000060"},"status":"published"},"_oai":{"id":"oai:repository.naro.go.jp:02000060","sets":["1706970004180:1","87:661:1727312983899:663:1707895637859"]},"author_link":["2303","1884","4981","1437","2005"],"control_number":"2000060","item_12_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2004-03-31","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"126","bibliographicPageStart":"113","bibliographicVolumeNumber":"202","bibliographic_titles":[{"bibliographic_title":"農業工学研究所技報","bibliographic_titleLang":"ja"},{"bibliographic_title":"Technical report of the National Research Institute of Agricultural Engineering","bibliographic_titleLang":"en"}]}]},"item_12_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In region of the high Reynolds (Re) number(Re=50,000～500,000) , the coefficient of energy loss in the bend ( shape : Simple 22.5°, simple 30°, 2 refractions 45°, 4 refractions 90°, and 3 refractions 90° ) of the smalldiameter pipeline ( nominal diameter : 80 A, 100 A, 150 A, and 200 A ) was measured. The cause of the dispersion in the pressure measurement was examined. As the result of the residual analysis, the flange connection effect was bigger, within the multiple causes. However, it was judged that this problem could be disregarded, because the dispersion of the pressure attenuated in the area from the flange junction to downstream. The coefficient of energy loss in bend became an exponential function in Re ＜200,000, and it decreased with the increase in the Re number. The coefficient of energy loss in bend separately showed the equation in the region of Re＜200,000 and Re＞200,000. The conversion table was made for the practical benefit. The result was compared with the measurement result by Kirchbach and Schubart in region (Re=30,000～240,000) of low Re number. As the result, this experiment result agreed with these past results. Therefore, it was confirmed that the coefficient of energy loss in bend was constant number, if the Re number is over 200,000, as Kirchbach indicated it.","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"パイプラインによって農業用水を送配水する際に生じる全エネルギー損失水頭は，摩擦損失と局所損失の和である。近年，道路下埋設やポンプ場の配置が多くなっているため，管路は屈折管が多用されており，屈折管による局所損失が全エネルギー損失水頭に占める割合は比較的大きいものと考えられる。そのため，屈折管による局所損失を正確に知ることは，性能設計における機能性と経済性の評価においても重要である。\n既往の研究において，屈折管による局所損失係数（以下，屈折損失係数と呼ぶ）の測定は，KirchbachとSchubartによって詳細に行われている( K i r c h b a c h，1 9 2 8；Schubart，1929）。農林水産省の設計基準「ポンプ場」と「パイプライン」の技術書の参考資料として，これらの計測結果のうち粗い管の屈折損失係数の値が整備されている。農業用パイプラインの幹線系における大口径を3000Aとすると，平均流速が2.0m/sの場合，常温下で管路内の流れのレイノルズ数（以下，Re数と表記する。）は約6,000,000である。また，小口径を150Aとすると，Re数は約300,000である。Kirchbachによれば，Re数が約200,000以上における屈折損失係数の値は一定であると判断して良いとされているが，KirchbachとSchubartの測定は，低Re数の領域（Re＝30,000～240,000）であるため，農業用の大口径パイプラインにおける流れの高Re数の領域においての検討が課題である。\n本報告では，現実的なパイプライン系の流れの状態に近い高Re数の領域における屈折損失係数を測定によって求めることを目的とした。","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_12_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24514/0002000060","subitem_identifier_reg_type":"JaLC"}]},"item_12_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"独立行政法人農業工学研究所","subitem_publisher_language":"ja"},{"subitem_publisher":"NATIONAL INSTITUTE FOR RURAL ENGINEERING INDEPENDENT ADMINISTRATIVE INSTITUTION","subitem_publisher_language":"en"}]},"item_12_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0915-3314","subitem_source_identifier_type":"PISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"TANAKA, Yoshikazu","creatorNameLang":"en"},{"creatorName":"田中, 良和","creatorNameLang":"ja"},{"creatorName":"タナカ, ヨシカズ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"TANAKA","familyNameLang":"en"},{"familyName":"田中","familyNameLang":"ja"},{"familyName":"タナカ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Yoshikazu","givenNameLang":"en"},{"givenName":"良和","givenNameLang":"ja"},{"givenName":"ヨシカズ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"2303","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"50360384","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=50360384"},{"nameIdentifier":"read0208741","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/read0208741"}]},{"creatorNames":[{"creatorName":"SHIMA, Takeo","creatorNameLang":"en"},{"creatorName":"島, 武男","creatorNameLang":"ja"},{"creatorName":"シマ, タケオ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"SHIMA","familyNameLang":"en"},{"familyName":"島","familyNameLang":"ja"},{"familyName":"シマ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Takeo","givenNameLang":"en"},{"givenName":"武男","givenNameLang":"ja"},{"givenName":"タケオ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"1884","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"20414427","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=20414427"},{"nameIdentifier":"t1125s","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/t1125s"}]},{"creatorNames":[{"creatorName":"NAKA, Tatsuo","creatorNameLang":"en"},{"creatorName":"中, 達雄","creatorNameLang":"ja"},{"creatorName":"ナカ, タツオ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"NAKA","familyNameLang":"en"},{"familyName":"中","familyNameLang":"ja"},{"familyName":"ナカ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Tatsuo","givenNameLang":"en"},{"givenName":"達雄","givenNameLang":"ja"},{"givenName":"タツオ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"4981","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"40414461","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=40414461"}]},{"creatorNames":[{"creatorName":"MUKAI, Akie","creatorNameLang":"en"},{"creatorName":"向井, 章恵","creatorNameLang":"ja"},{"creatorName":"ムカイ, アキエ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"MUKAI","familyNameLang":"en"},{"familyName":"向井","familyNameLang":"ja"},{"familyName":"ムカイ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Akie","givenNameLang":"en"},{"givenName":"章恵","givenNameLang":"ja"},{"givenName":"アキエ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"1437","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"90414458","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=90414458"},{"nameIdentifier":"mukaia","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/mukaia"}]},{"creatorNames":[{"creatorName":"TARUYA, Hiroyuki","creatorNameLang":"en"},{"creatorName":"樽屋, 啓之","creatorNameLang":"ja"},{"creatorName":"タルヤ, ヒロユキ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"TARUYA","familyNameLang":"en"},{"familyName":"樽屋","familyNameLang":"ja"},{"familyName":"タルヤ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Hiroyuki","givenNameLang":"en"},{"givenName":"啓之","givenNameLang":"ja"},{"givenName":"ヒロユキ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"2005","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"00355653","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=00355653"},{"nameIdentifier":"read0208737","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/read0208737"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2024-03-01"}],"displaytype":"detail","filename":"TRNIREJ202_113-126.pdf","filesize":[{"value":"462 KB"}],"format":"application/pdf","license_note":"©　 国立研究開発法人 農業・食品産業技術総合研究機構\nNational Agriculture and Food Research Organization, Japan","licensetype":"license_note","mimetype":"application/pdf","url":{"url":"https://repository.naro.go.jp/record/2000060/files/TRNIREJ202_113-126.pdf"},"version_id":"c52950b3-d2db-4fb4-aee7-f5b3de0b987b"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"鋼管における屈折損失係数の試験的研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"鋼管における屈折損失係数の試験的研究","subitem_title_language":"ja"},{"subitem_title":"A measurement study of refraction loss factor in the steel pipe","subitem_title_language":"en"}]},"item_type_id":"12","owner":"12","path":["1707895637859","1"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-03-01"},"publish_date":"2024-03-01","publish_status":"0","recid":"2000060","relation_version_is_last":true,"title":["鋼管における屈折損失係数の試験的研究"],"weko_creator_id":"12","weko_shared_id":-1},"updated":"2024-08-08T01:28:48.281678+00:00"}