{"created":"2023-06-20T15:05:54.727816+00:00","id":35273,"links":{},"metadata":{"_buckets":{"deposit":"cfbdb422-9f04-4f99-b3c6-2212e38d69d5"},"_deposit":{"created_by":1,"id":"35273","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"35273"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00035273","sets":["1887:1890","1896:1898:1899:1993"]},"author_link":["421482","421481"],"item_9_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"On the Characteristics of the Installed Engine-Air-Cooler System. Part III : Comparison of the Three Cooling System, namely, Cross-Flow-Type, Parallel-Counter-Flow Type and Cooling Medium Type."}]},"item_9_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1942-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"247","bibliographicPageEnd":"507","bibliographicPageStart":"501","bibliographicVolumeNumber":"18","bibliographic_titles":[{"bibliographic_title":"東京帝國大學航空研究所報告"},{"bibliographic_title":"Report of Aeronautical Research Institute, Tokyo Imperial University","bibliographic_titleLang":"en"}]}]},"item_9_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"1. The overall performances of an aero-engine with the installed engine-air-cooler system are discussed for the following three system: -i. Parallel-counter-flow type, ii. Cross-flow type, and iii. Cooling medium type (The heat of the engine-air is transferred to the cooling medium with the aid of the first cooler and the heat of the cooling medium is discharged into the atmosphere through the second cooler.) 2. The overall temperature efficiency η_t, η_θ' of the engine-air-cooler system using a cooling medium. Put β=G_t/G_0 then β=t'-θ_1/t_1-t'-η_0/η_t and [numerical formula] where t'=θ'=the mean temperature of the cooling medium. 3. Figs.1～4 are the comparisons of the η_t' for the three cooling systems. It will be seen from these curves that the parallel-counter-flow type is the most efficient, followed by the cross flow type, the cooling medium type, being the least so, all the differences in the overall temperature efficiencies are small. 4. The overall performances (FP_b/FP_b0-FP_d/FP_b0) of an aero-plane using the engine-air-cooler were calculated for the three cooling systems with the following. (i) The overall performances of the three systems differ slightly ranging from 1 to 3%. (ii) The higher the pressure ratio of the first stage supercharger, the more effective the action of the inter-coolers. For the case of η_t=η_θ=90%, u_t=20m/s, β=0.3, b_4'=5, the pressure ratio of the first and second stage supercharger=respectively are 3.5, and 1.527, the height of flight being 10km, the gain in performance, namely, FP_b/FP_b0-FP_d/FP_b0, is about 26%. (iii) It is preferable to choose coolers of the largest possible thermal efficiency of η_t, η_θ and also the smollest possible values for u_t, u_θ.","subitem_description_type":"Other"}]},"item_9_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: SA4146427000","subitem_description_type":"Other"}]},"item_9_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京帝國大學航空研究所"}]},"item_9_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Aeronautical Research Institute, Tokyo Imperial University"}]},"item_9_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00387631","subitem_source_identifier_type":"NCID"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"西脇, 仁一"}],"nameIdentifiers":[{"nameIdentifier":"421481","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"NISIWAKI, Niiti","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"421482","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":"2020-01-24"}],"displaytype":"detail","filename":"SA4146427.pdf","filesize":[{"value":"651.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"SA4146427.pdf","url":"https://jaxa.repo.nii.ac.jp/record/35273/files/SA4146427.pdf"},"version_id":"bae1af3c-bacb-4b37-b843-f97385be1300"}]},"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":"給氣冷却器の性能(第3報) : 各種冷却法の性能上の比較","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"給氣冷却器の性能(第3報) : 各種冷却法の性能上の比較"}]},"item_type_id":"9","owner":"1","path":["1890","1993"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"35273","relation_version_is_last":true,"title":["給氣冷却器の性能(第3報) : 各種冷却法の性能上の比較"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T23:22:55.745954+00:00"}