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超音速噴流に関する研究 第1報 過膨張超音速噴流中に発生する擬似衝撃波について
http://hdl.handle.net/20.500.12000/26639
http://hdl.handle.net/20.500.12000/26639d803db62-b647-47e2-b007-811fd4e9496c
名前 / ファイル | ライセンス | アクション |
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Item type | デフォルトアイテムタイプ(フル)(1) | |||||||||
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公開日 | 2013-06-28 | |||||||||
タイトル | ||||||||||
タイトル | 超音速噴流に関する研究 第1報 過膨張超音速噴流中に発生する擬似衝撃波について | |||||||||
言語 | ja | |||||||||
タイトル | ||||||||||
タイトル | Investigation of the Supersonic Jet:1st report, On the psuedo-shock waves standing in the overexpanded jets | |||||||||
言語 | en | |||||||||
作成者 |
永井, 實
× 永井, 實
× Nagai, Minoru
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アクセス権 | ||||||||||
アクセス権 | open access | |||||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | Supersonic air jets from the D'Laval nozzle of designed Mach number 2.0 were experimentally investigated. Some typical flow patterns of overexpanded, designed and underexpanded flows were observed by the schlieren system and the various pressure measurements. Then, the normal shock wave standing just at the nozzle exit in the overexpanded flow was cleared as to be recognized as a pseudo-shock wave, because the normal shock wave had interacted with the shear layer of jet boundary and the compression region of the shock wave was lengthened to some diameters of the nozzle exit. The pitot and static pressure along the jet axis were varied up and down alternately influenced by the shock waves and expansion waves in the pseudo-shock wave. Both of the pitot and static pressure distributions normal to the flow axis had two or more peaks in the region of pseudo-shock, because of the existence of λ type or X type shock waves. After the region, static pressure became to have the value of the atmospheric pressure, and then the pitot pressure coincided with that of the ordinary incompressible circular free jet asymptotically. The static pressure ratio across the pseudo-sheck wave was only 38% of the theoretical value of the normal shock wave, and even the maximam peak pressure value measured in the front part of the pseudo-shock was not more than about 52%. | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | 紀要論文 | |||||||||
出版者 | ||||||||||
出版者 | 琉球大学理工学部 | |||||||||
言語 | ja | |||||||||
出版者 | ||||||||||
出版者 | Science and Engineering Division, University of the Ryukyus | |||||||||
言語 | en | |||||||||
言語 | ||||||||||
言語 | jpn | |||||||||
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 | departmental bulletin paper | |||||||||
出版タイプ | ||||||||||
出版タイプ | VoR | |||||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
識別子 | ||||||||||
識別子 | http://hdl.handle.net/20.500.12000/26639 | |||||||||
識別子タイプ | HDL | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | ISSN | |||||||||
収録物識別子 | 0387-429X | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AN00250785 | |||||||||
収録物名 | ||||||||||
収録物名 | 琉球大学理工学部紀要. 工学篇 | |||||||||
言語 | ja | |||||||||
収録物名 | ||||||||||
収録物名 | Bulletin of Science & Engineering Division, University of the Ryukyus. Engineering | |||||||||
言語 | en | |||||||||
書誌情報 |
号 12, p. 1-8, 発行日 1976-09-28 |