{"created":"2023-06-20T15:08:03.379179+00:00","id":3760,"links":{},"metadata":{"_buckets":{"deposit":"9ec1be3b-18eb-4018-bfe5-12f3010249aa"},"_deposit":{"created_by":3,"id":"3760","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"3760"},"status":"published"},"_oai":{"id":"oai:ynu.repo.nii.ac.jp:00003760","sets":["495:496"]},"author_link":["181","16263","16265","16262"],"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2006","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{"bibliographic_title":"Proceedings of the 23rd IAHR Symposium on Hydraulic Machinery and Systems, Yokohama, October 2006"}]}]},"item_3_description_19":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_3_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In the range of very low specific speed ns, improvement of efficiency is the most important subject in order to apply turbo machine to such a low specific speed range. The purpose of the present study is focused on the performance improvement of pump in the range of ns≦80[m,m3/min,min-1], and CFD simulation is performed to determine the reason why efficiency is very low. Moreover, in order to obtain very low specific speed impeller with high efficiency, a new type centrifugal impeller with radial grooves mounted at the back of both front and rear shrouds is simulated and tested to reveal the performance improvement. The result shows that a rapidly increase of leakage rate and disk friction rate with a decrease of ns is the main reason of law efficiency. Also, the result shows that if the leakage loss is reduced by use of Labyrinth seal at ns=25, the disk friction rapidly increases in spite of the leakage reduction and pump overall efficiency becomes only 5% higher. Moreover, the new type impeller with grooves produces very high-head compared with that of normal impeller at ns=80.","subitem_description_type":"Abstract"}]},"item_3_full_name_2":{"attribute_name":"著者(ヨミ)","attribute_value_mlt":[{"nameIdentifiers":[{},{}],"names":[{"name":"クロカワ, ジュンイチ"}]}]},"item_3_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"181","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"40017976","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=40017976"}],"names":[{"name":"黒川, 淳一"}]}]},"item_3_publisher_37":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"International Association of Hydraulic Research (IAHR)"}]},"item_3_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"Yokohama National Univ., Japan"},{"subitem_text_value":"Yokohama National Univ., Japan"},{"subitem_text_value":"Yokohama National Univ., Japan"},{"subitem_text_value":"Yokohama National Univ., Japan"}]},"item_3_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kagawa, Shusaku"}],"nameIdentifiers":[{"nameIdentifier":"16262","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsui, Jun"}],"nameIdentifiers":[{"nameIdentifier":"16263","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kurokawa, Junichi"}],"nameIdentifiers":[{"nameIdentifier":"181","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"40017976","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=40017976"}]},{"creatorNames":[{"creatorName":"Choi, Young-do"}],"nameIdentifiers":[{"nameIdentifier":"16265","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-09-16"}],"displaytype":"detail","filename":"B-150.pdf","filesize":[{"value":"1.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"B-150.pdf","url":"https://ynu.repo.nii.ac.jp/record/3760/files/B-150.pdf"},"version_id":"05fd7407-6ca8-438f-bd02-cb0d6e3e7022"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Turbomachinery","subitem_subject_scheme":"Other"},{"subitem_subject":"Centrifugal Pump","subitem_subject_scheme":"Other"},{"subitem_subject":"Very Low Specific Speed","subitem_subject_scheme":"Other"},{"subitem_subject":"CFD","subitem_subject_scheme":"Other"},{"subitem_subject":"Loss Analysis","subitem_subject_scheme":"Other"},{"subitem_subject":"Performance Improvement","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"Loss Analysis and Performance Improvement of Very Low Specific Speed Centrifugal Pumps","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Loss Analysis and Performance Improvement of Very Low Specific Speed Centrifugal Pumps"}]},"item_type_id":"3","owner":"3","path":["496"],"pubdate":{"attribute_name":"公開日","attribute_value":"2008-09-17"},"publish_date":"2008-09-17","publish_status":"0","recid":"3760","relation_version_is_last":true,"title":["Loss Analysis and Performance Improvement of Very Low Specific Speed Centrifugal Pumps"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-06-20T21:41:25.061742+00:00"}