{"created":"2023-06-20T15:11:29.605310+00:00","id":41163,"links":{},"metadata":{"_buckets":{"deposit":"36bc158d-673f-4ff6-8600-bd520e367488"},"_deposit":{"created_by":1,"id":"41163","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"41163"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00041163","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["450856","450861","450859","450860","450863","450864","450858","450862","450857","450865"],"item_3_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"回流水槽試験により推定した天文観測用ドーム周辺の流れの2、3の性質:流れの可視化技術の応用"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1992-09","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"19","bibliographicPageStart":"1","bibliographicVolumeNumber":"1178T","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"天文観測用のドームはこれまで半球状の特徴ある屋根を持つ形状であるのが普通であった。国立天文台が標高4,200mのハワイ島マウナケア山頂の国際観測所に建設を計画している直径8mの光学赤外線反射望遠鏡では、その分解能を世界一の0.2秒程度まで高めることを目標にしており、これを実現するために光学系の設計などの様々な努力が重ねられているが、ドーム内の滞留空気の温度分布あるいは反射鏡面上の温度境界層による像の揺らぎが問題となる程の厳しい条件である。そこで、マウナケア山頂に定常的に吹く、温度-5度Cから10度C、風速9m/secの安定した貿易風を利用してドーム内を一定温度の新鮮な外気でフラッシング(吹き払う)して、空気の温度分布による揺らぎを無くす方法が期待され、このため、ドーム外形状から設計を検討する必要が生じた。すなわちドームの外形および内部流を支配する換気孔、ルーバなどの配置など流体力学的な設計が必要となった。航空宇宙技術研究所(NAL)では国立天文台の要請を受け、同天文台と共同して、これまでに蓄積して来た流れの可視化技術による実験解析技術を活用して、ドームの流体力学的設計の基礎資料を得るため、小型回流水槽を用いた模型試験を行なった。供試模型は従来型半球ドーム(HSモデル)、台形ドーム(NTTモデル)、楕円筒形ドーム(MEモデル)の3種の形態による計画規模(直径40m)の1/500スケールのアクリル製模型である。流れは、色素流脈法、水素気泡法により模型の内外流線、地面境界層のドーム内流れ込み、ドーム内のフラッシング時間などについて可視化手法を適用し、流体力学的な特性を解析した。この結果、いずれの項目に対しても反射鏡面上を含む光路内に好ましい流れを得るという観点から、楕円筒形ドームの優位性が見出された。また、ここに適用した流れの可視化手法および解析法が、この種の分野にも有効であることが確認された。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"Studies on the seeing conditions inside telescope domes indicate that substantial air ventilation is necessary to prevent image degradation due to thermal nonuniformity of the air within the dome, especially for a dome as large as the Japan National Large Telescope (JNLT). In traditional telescope enclosures, in which a cylinder is topped by a hemispherical dome, the air flow quality is influenced by factors such as temperature fluctuations and the distribution of dust contamination which affect the seeing conditions. To determine the best telescope shape from a perspective of achieving desirable air ventilation conditions, the National Aerospace Laboratory (NAL) and National Astronomical Observatory (NAO) jointly studied dome shapes. Flow visualization techniques were applied to the tests using a circulating water channel developed by the NAL Aeroengine Division in order to evaluate flow properties inside and outside models of a telescope enclosure. The hydrogen bubble method and dye injection technique with image processing were primarily utilized. Three types of enclosure models (one to 500 scale) were designed: i.e.; (1) a traditional shape having a circular cylinder base topped by a HemiSphere (HS); (2) a straight-sided trapezoidal shape (New Technology Telescope, NTT); and (3) a flat-roof cylinder with sidewall (Modified Enclosure, ME); subsequently tested in the circulating water channel. Flushing of the enclosure was also closely observed via dye-injection.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0004193000","subitem_description_type":"Other"}]},"item_3_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL TR-1178T","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0389-4010","subitem_source_identifier_type":"ISSN"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"航空宇宙技術研究所 原動機部"},{"subitem_text_value":"航空宇宙技術研究所 原動機部"},{"subitem_text_value":"国立天文台"},{"subitem_text_value":"国立天文台"},{"subitem_text_value":"国立天文台"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Aeroengine Division"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Aeroengine Division"},{"subitem_text_language":"en","subitem_text_value":"National Astronomical Observatory"},{"subitem_text_language":"en","subitem_text_value":"National Astronomical Observatory"},{"subitem_text_language":"en","subitem_text_value":"National Astronomical Observatory"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"進藤, 重美"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"坂田, 公夫"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"安藤, 裕康"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Barr, L."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"宮下, 暁彦"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Shindo, Shigemi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Sakata, Kimio","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ando, Hiroyasu","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Barr, L.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Miyashita, Akihiko","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-27"}],"displaytype":"detail","filename":"naltr1178t.pdf","filesize":[{"value":"4.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr1178t.pdf","url":"https://jaxa.repo.nii.ac.jp/record/41163/files/naltr1178t.pdf"},"version_id":"6d8bea8f-b306-4977-ba4e-8e4cf9f62d94"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"天文台ドーム","subitem_subject_scheme":"Other"},{"subitem_subject":"設計","subitem_subject_scheme":"Other"},{"subitem_subject":"半球ドーム","subitem_subject_scheme":"Other"},{"subitem_subject":"台形ドーム","subitem_subject_scheme":"Other"},{"subitem_subject":"楕円筒形ドーム","subitem_subject_scheme":"Other"},{"subitem_subject":"天体望遠鏡塔舎","subitem_subject_scheme":"Other"},{"subitem_subject":"光学的天体観測","subitem_subject_scheme":"Other"},{"subitem_subject":"空力設計","subitem_subject_scheme":"Other"},{"subitem_subject":"ドーム換気","subitem_subject_scheme":"Other"},{"subitem_subject":"自然風換気","subitem_subject_scheme":"Other"},{"subitem_subject":"ビルディング","subitem_subject_scheme":"Other"},{"subitem_subject":"空気力学","subitem_subject_scheme":"Other"},{"subitem_subject":"染料注入法","subitem_subject_scheme":"Other"},{"subitem_subject":"光学的透過性能","subitem_subject_scheme":"Other"},{"subitem_subject":"温度境界層","subitem_subject_scheme":"Other"},{"subitem_subject":"astronomical observatory dome","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"design","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"hemisphere dome","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"straight sided trapezoidal shape dome","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"flat roof cylinder with sidewall dome","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"telescope enclosure","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"optical star observation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"aerodynamic design","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"dome air ventilation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"flushing ventilation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"building","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"visibility performance","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"thermal boundary layer","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"thermal nonuniformity","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"temperature gradient effect","subitem_subject_language":"en","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":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"Some flow properties of telescope enclosures estimated from water channel tests: Application of the flow visualization techniqes","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Some flow properties of telescope enclosures estimated from water channel tests: Application of the flow visualization techniqes","subitem_title_language":"en"}]},"item_type_id":"3","owner":"1","path":["1893","1917"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"41163","relation_version_is_last":true,"title":["Some flow properties of telescope enclosures estimated from water channel tests: Application of the flow visualization techniqes"],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T19:12:52.412871+00:00"}