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遊泳魚体の低抵抗性に関する基礎的研究
http://hdl.handle.net/10232/13663
http://hdl.handle.net/10232/136638783b2e3-3cd4-483f-9d31-831d9da87495
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
AN00040498_v25-2_p51-169.pdf (13.2 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-06-17 | |||||
| タイトル | ||||||
| タイトル | 遊泳魚体の低抵抗性に関する基礎的研究 | |||||
| タイトル言語 | ja | |||||
| タイトル | ||||||
| タイトル | Fundamental Studies on the Low-resistance of Swimming Fish | |||||
| タイトル言語 | en | |||||
| 著者 |
奈良迫, 嘉一
× 奈良迫, 嘉一 |
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| 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 | |||||
| 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 | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | It has been confirmed that the body-resistance of a living fish in water is far less than that of any fish-like-formed rigid-body. And according to the hydro-dynamical calculations, between the co-efficient-values of their frictional resistances, there seems to be a difference of 1/10 order. In order to clarify the process of this resistance-reduction，various resistance-tests were carried out, with the use of a lot of models, by the author, basing on the hitherto ascertained view-points, namely: ‘Passive Fish-skin Effect’， ‘Slime Effect’，’Slotting Effect derived from the Gill-cover-holes’，’Active Fish-skin Effect’ and the ‘Caudal-fin Effect’. (I) The Effects of Passive-ski, Slime and Slotting on the resistance-reduction. Having got a hint from Kraemer's Dolphin-model, the author measured the hardness of the bodies of living Scombroid and Frigate mackerel, and made models of silicone rubber having the hardness similar to those of the two fishes. Some experiments were made, in order to make a resistance-comparison between the rigid and the flexible models, at the Kagoshima-University Circulating-water-channel, within the Reynolds number: 0.5×10^5 ~ 9.0×10^5. Consequently it was confirmed that generally there was little difference between the rigidly bodied model and the flexibly bodied one. As to the effect of oil coated on the surface of the fish-model, it was ascertained that the fish-oil which was used usually, for example, a whale-oil, rather increased the resistance than otherwise, with the author’ s failure in confirming the effect of slime-‘Toms effect’ by polymers. And concerning the effects coming from the opened or the closed mouth of the fish, and from the opened or closed gill-cover of the fish, respectively; the expected slotting effect by jet-flow from gill-cover-holes was not recognized; conversely it was ascertained that the resistance was made rather larger by the effect coming from the opened mouth and the opened gill-cover. Basing on the view-point of respiratory movement of fish in sea-water, the calculated velocity of jet-flowing from the gill-cover-holes was found to be quitenegligible. Consequently, the effect of slotting due to the motion of the gill-cover holes on resistance reduction was fixed to be negative. [the rest omitted] | |||||
| 内容記述言語 | en | |||||
| 収録雑誌名 |
ja : 鹿児島大学水産学部紀要 en : Memoirs of Faculty of Fisheries Kagoshima University 巻 25, 号 2, p. 51-169, 発行日 1976-12-25 |
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| 作成日 | ||||||
| 日付 | 1976-12-25 | |||||
| 日付タイプ | Issued | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| ISSN | 0453087X | |||||
| NII書誌ID（雑誌） | ||||||
| 収録物識別子タイプ | NCID | |||||
| NC ID | AN00040498 | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| NDC | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 664 | |||||
| 公開者・出版者 | ||||||
| 出版者 | 鹿児島大学 | |||||
| 出版者言語 | ja | |||||
| 公開者・出版者 | ||||||
| 出版者 | Kagoshima University | |||||
| 出版者言語 | en | |||||
| 備考 | ||||||
| 備考言語 | ja | |||||
| 備考 | 東京大学審査学位論文 (Thesis submitted for the degree of Doctor of Agriculture at the University of Tokyo，Dec. 1975)． | |||||
