WEKO3
アイテム
{"_buckets": {"deposit": "68340f04-91a6-44c6-8011-df95515e41d5"}, "_deposit": {"created_by": 1, "id": "22519", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "22519"}, "status": "published"}, "_oai": {"id": "oai:jaxa.repo.nii.ac.jp:00022519", "sets": ["1888"]}, "author_link": ["211120", "211121", "211122"], "item_7_biblio_info_10": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2015-05", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "888", "bibliographicPageStart": "883", "bibliographicVolumeNumber": "31", "bibliographic_titles": [{}, {"bibliographic_title": "Journal of Propulsion and Power", "bibliographic_titleLang": "en"}]}]}, "item_7_description_17": {"attribute_name": "抄録(英)", "attribute_value_mlt": [{"subitem_description": "For shear coaxial injectors, which are widely used in liquid oxygen–gaseous hydrogen rocket engines, the key parameters that characterize injector geometry are the recess length, taper angle, and wall thickness of the liquid oxygen post, which is the inner tube of the coaxial injector. In the present study, the effects of the recessed length and taper angle of the liquid oxygen post on cryogenic coaxial jets at supercritical pressures were experimentally investigated. The large-scale structure and mixing enhancement of cryogenic nitrogen and gaseous helium coaxial jets were evaluated using a high-speed backlighting technique. Instantaneous backlit images revealed that the dark core, which is believed to be dense nitrogen, exhibited sinusoidal forms induced by the presence of the outer helium jets. However, the sinusoidal oscillations were less influenced by the injector geometry. The mixing enhancement of coaxial jets was evaluated with respect to the dark-core length and the jet spread angle. The recessed liquid oxygen post enhanced the mixing of cryogenic nitrogen when the recess length was sufficiently large, which suggests that a recess of a certain length is required to improve the mixing of cryogenic coaxial jets at supercritical pressures. Because the decrease in the dark-core length with the recessed length was consistent with the increase in the jet spread angle at the injector exit, the mixing enhancement caused by the recess can be regarded as a result of an improvement in the mixing between the inner and outer jets in the recessed region. The effects of the liquid oxygen post exit taper on the mixing enhancement were more significant than those of the recess. The decrease in the dark-core length with the inner-to-outer momentum flux ratio (J number) is consistent with the relevant empirical correlation at supercritical pressures. Therefore, the mixing enhancement caused by the liquid oxygen post exit taper can be considered the result of an increase in the J number, rather than the result of giving azimuthal velocity to the cryogenic nitrogen jet at the liquid oxygen post exit.", "subitem_description_type": "Other"}]}, "item_7_description_32": {"attribute_name": "資料番号", "attribute_value_mlt": [{"subitem_description": "資料番号: PA1510017000", "subitem_description_type": "Other"}]}, "item_7_publisher_9": {"attribute_name": "出版者(英)", "attribute_value_mlt": [{"subitem_publisher": "American Institute of Aeronautics and Astronautics (AIAA)"}]}, "item_7_relation_25": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_name": [{"subitem_relation_name_text": "info:doi/10.2514/1.B35530"}], "subitem_relation_type_id": {"subitem_relation_type_id_text": "http://dx.doi.org/10.2514/1.B35530", "subitem_relation_type_select": "DOI"}}]}, "item_7_source_id_21": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0748-4658", "subitem_source_identifier_type": "ISSN"}]}, "item_7_source_id_24": {"attribute_name": "書誌レコードID", "attribute_value_mlt": [{"subitem_source_identifier": "AA10459896", "subitem_source_identifier_type": "NCID"}]}, "item_7_text_35": {"attribute_name": "JAXAカテゴリ", "attribute_value_mlt": [{"subitem_text_value": "JAXAカテゴリ: 学術雑誌論文"}]}, "item_7_text_36": {"attribute_name": "JAXAカテゴリ2", "attribute_value_mlt": [{"subitem_text_value": "JAXAカテゴリ2: TP"}]}, "item_7_text_43": {"attribute_name": "DSpaceコレクション番号", "attribute_value_mlt": [{"subitem_text_value": "DSpaceコレクション番号: 12"}]}, "item_7_text_7": {"attribute_name": "著者所属(英)", "attribute_value_mlt": [{"subitem_text_language": "en", "subitem_text_value": "Japan Aerospace Exploration Agency(JAXA)"}, {"subitem_text_language": "en", "subitem_text_value": "University of Tokyo"}, {"subitem_text_language": "en", "subitem_text_value": "University of Tokyo"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "metadata only access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_14cb"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Tani, Hiroumi", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "211120", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Teramoto, Susumu", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "211121", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Okamoto, Koji", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "211122", "nameIdentifierScheme": "WEKO"}]}]}, "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": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Effects of Injector Geometry on Cryogenic Shear Coaxial Jets at Supercritical Pressures", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Effects of Injector Geometry on Cryogenic Shear Coaxial Jets at Supercritical Pressures", "subitem_title_language": "en"}]}, "item_type_id": "7", "owner": "1", "path": ["1888"], "permalink_uri": "https://jaxa.repo.nii.ac.jp/records/22519", "pubdate": {"attribute_name": "公開日", "attribute_value": "2015-05-28"}, "publish_date": "2015-05-28", "publish_status": "0", "recid": "22519", "relation": {}, "relation_version_is_last": true, "title": ["Effects of Injector Geometry on Cryogenic Shear Coaxial Jets at Supercritical Pressures"], "weko_shared_id": -1}
Effects of Injector Geometry on Cryogenic Shear Coaxial Jets at Supercritical Pressures
https://jaxa.repo.nii.ac.jp/records/22519
https://jaxa.repo.nii.ac.jp/records/225197688e53b-ee34-4171-b794-6244f1986e27
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2015-05-28 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Effects of Injector Geometry on Cryogenic Shear Coaxial Jets at Supercritical Pressures | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Tani, Hiroumi
× Tani, Hiroumi× Teramoto, Susumu× Okamoto, Koji |
|||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency(JAXA) | ||||||
著者所属(英) | ||||||
en | ||||||
University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
University of Tokyo | ||||||
出版者(英) | ||||||
出版者 | American Institute of Aeronautics and Astronautics (AIAA) | |||||
書誌情報 |
en : Journal of Propulsion and Power 巻 31, 号 3, p. 883-888, 発行日 2015-05 |
|||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | For shear coaxial injectors, which are widely used in liquid oxygen–gaseous hydrogen rocket engines, the key parameters that characterize injector geometry are the recess length, taper angle, and wall thickness of the liquid oxygen post, which is the inner tube of the coaxial injector. In the present study, the effects of the recessed length and taper angle of the liquid oxygen post on cryogenic coaxial jets at supercritical pressures were experimentally investigated. The large-scale structure and mixing enhancement of cryogenic nitrogen and gaseous helium coaxial jets were evaluated using a high-speed backlighting technique. Instantaneous backlit images revealed that the dark core, which is believed to be dense nitrogen, exhibited sinusoidal forms induced by the presence of the outer helium jets. However, the sinusoidal oscillations were less influenced by the injector geometry. The mixing enhancement of coaxial jets was evaluated with respect to the dark-core length and the jet spread angle. The recessed liquid oxygen post enhanced the mixing of cryogenic nitrogen when the recess length was sufficiently large, which suggests that a recess of a certain length is required to improve the mixing of cryogenic coaxial jets at supercritical pressures. Because the decrease in the dark-core length with the recessed length was consistent with the increase in the jet spread angle at the injector exit, the mixing enhancement caused by the recess can be regarded as a result of an improvement in the mixing between the inner and outer jets in the recessed region. The effects of the liquid oxygen post exit taper on the mixing enhancement were more significant than those of the recess. The decrease in the dark-core length with the inner-to-outer momentum flux ratio (J number) is consistent with the relevant empirical correlation at supercritical pressures. Therefore, the mixing enhancement caused by the liquid oxygen post exit taper can be considered the result of an increase in the J number, rather than the result of giving azimuthal velocity to the cryogenic nitrogen jet at the liquid oxygen post exit. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0748-4658 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10459896 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://dx.doi.org/10.2514/1.B35530 | |||||
関連名称 | info:doi/10.2514/1.B35530 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: PA1510017000 |