{"created":"2023-06-20T15:07:29.353423+00:00","id":36858,"links":{},"metadata":{"_buckets":{"deposit":"ddc143c0-c9a9-41df-9c99-7882614480b9"},"_deposit":{"created_by":1,"id":"36858","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"36858"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00036858","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["477897","477899","477902","477898","477900","477901"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Measurement of plasma electron density around HYFLEX vehicle"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1996-09","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"175","bibliographicPageStart":"169","bibliographicVolumeNumber":"32","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料"},{"bibliographic_title":"Special Publication of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_5_description_14":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"24-25 Jul. 1996","subitem_description_type":"Other"}]},"item_5_description_15":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）（英）","attribute_value_mlt":[{"subitem_description":"24-25 Jul. 1996","subitem_description_type":"Other"}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"極超音速での飛行中には機体まわりの気体が電解離してプラズマ状態になることが知られている。このため、プラズマ層によって電波が反射されブラックアウト現象が生じ、また、温度や圧力が気体の電解離を仮定しない場合の予測からはずれる。ところが、この種のデータは地上試験で得ることが困難であり、今回のHYFLEX(極超音速飛行実験)機飛行試験はこの種のデータを取得できる貴重な機会である。HYFLEXでは、機体まわりで生じる気体の電離現象を、リフレクトメータによって機上から測定した。取得したデータは、電波の反射強度および位相の変化である。一方、飛行試験結果と比較するため、実在気体CFD(数値流体力学)コードを用いた数値解析によってプラズマ密度場を計算し、この結果を用いて電波反射解析を行った。飛行試験結果と数値計算結果はよく一致し、実在気体CFDコードの結果を、プラズマ電子密度に換算して2倍程度の誤差で検証することができた。今後、電波反射解析手法の検討などにより、さらに検証精度を上げる必要があるが、本飛行試験データは、機体まわりのプラズマ電子密度場の基礎データとして、また、CFDおよび電波反射解析手法の検証データとして非常に有用であった。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"It is known to become a plasma state by electrolyzing the gas around the vehicle under hypersonic speed flight. Therefore, the radio wave is reflected by the plasma layer, and the blackout phenomena occurs. In the other, it is also reported that temperature, pressure and density around the vehicle deviates from the prediction which do not assume electrolyzing of the gas. Although it is difficult to obtain the such kind of data in the ground test, present HYFLEX (Hypersonic Flight Experiment) plan is the precious opportunity which can acquire the data of plasma state around the vehicle. In HYFLEX, it was planned that the ionizing phenomena of the gas around the airframe was measured by the reflectometer from the onboard, and the data acquisition was done. Acquired data is the change of reflection intensity and phase of the radio wave. In the meantime, the plasma density field was calculated using the real gas CFD (Computational Fluid Dynamics) code and the radio wave reflection analysis was carried out in order to compare with the flight test. Flight test result and numerical calculation result agreed well, and the real gas CFD code was verified at an error of about two times by the conversion to the plasma electron density. Although the verification accuracy has to be raised more by examination of the radio wave reflection analysis technique, etc., this flight test data was very useful as basic data of plasma electron density field around hypersonic flight vehicle, and as verification data of real gas CFD code and the radio wave reflection analysis technique.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0000584020","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL SP-32","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0289-260X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10097345","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"航空宇宙技術研究所"},{"subitem_text_value":"航空宇宙技術研究所"},{"subitem_text_value":"宇宙開発事業団"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory"},{"subitem_text_language":"en","subitem_text_value":"National Space Development Agency of Japan"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"伊藤, 健"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"高木, 亮治"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"寺岡, 謙"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ito, Takeshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Takaki, Ryoji","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Teraoka, Ken","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":"2020-02-10"}],"displaytype":"detail","filename":"nalsp0032020.pdf","filesize":[{"value":"795.9 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0032020.pdf","url":"https://jaxa.repo.nii.ac.jp/record/36858/files/nalsp0032020.pdf"},"version_id":"27406456-a7a9-449f-8480-1fb964296695"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"極超音速飛行実験","subitem_subject_scheme":"Other"},{"subitem_subject":"HYFLEX","subitem_subject_scheme":"Other"},{"subitem_subject":"気体電離","subitem_subject_scheme":"Other"},{"subitem_subject":"プラズマ電子密度","subitem_subject_scheme":"Other"},{"subitem_subject":"ブラックアウト現象","subitem_subject_scheme":"Other"},{"subitem_subject":"リフレクトメータ","subitem_subject_scheme":"Other"},{"subitem_subject":"電波反射解析","subitem_subject_scheme":"Other"},{"subitem_subject":"電波位相","subitem_subject_scheme":"Other"},{"subitem_subject":"数値流体力学","subitem_subject_scheme":"Other"},{"subitem_subject":"プラズマ密度場","subitem_subject_scheme":"Other"},{"subitem_subject":"hypersonic flight experiment","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"HYFLEX","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"gas ionization","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"plasma electron density","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"blackout phenomenon","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"reflectometer","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"radio wave reflection analysis","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"radio wave phase","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"computational fluid dynamics","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"plasma density field","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"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":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"リフレクトメータによる機体まわりのプラズマ電子密度測定","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"リフレクトメータによる機体まわりのプラズマ電子密度測定"}]},"item_type_id":"5","owner":"1","path":["1891","1915"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"36858","relation_version_is_last":true,"title":["リフレクトメータによる機体まわりのプラズマ電子密度測定"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:30:29.929561+00:00"}