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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第64巻 第1号 >
連続採水のための曳航体システムの開発に関する研究
| Title: | 連続採水のための曳航体システムの開発に関する研究 |
| Other Titles: | Study on the Design of Towed Body System for Continuous Water Sampling |
| Authors: | 高橋, 勇樹1 Browse this author | | 藤森, 康澄2 Browse this author →KAKEN DB | | 坂岡, 桂一郎3 Browse this author →KAKEN DB | | 渡邉, 豊4 Browse this author →KAKEN DB | | 木村, 暢夫5 Browse this author →KAKEN DB |
| Authors(alt): | Takahashi, Yuki1 | | Fujimori, Yasuzumi2 | | Sakaoka, Keiichirou3 | | Watanabe, Yutaka4 | | Kimura, Nobuo5 |
| Keywords: | Towed body | | Continuous water sampling | | CFD analysis |
| Issue Date: | 14-Mar-2014 |
| Publisher: | 北海道大学大学院水産科学研究院 |
| Journal Title: | 北海道大学水産科学研究彙報 |
| Volume: | 64 |
| Issue: | 1 |
| Start Page: | 1 |
| End Page: | 8 |
| Abstract: | A seawater sampling system using underwater towed body was developed to obtain the water continuously. The system was composed of two towed bodies, which are vertically linked each other, to sample water in different layers. The range of towing speed and target depth of the system were planned as up to 5.0 kt, and 10.0 to 20.0 m, respectively. At first, hydrodynamic characteristic of the towed body was examined using CFD analysis, and then the towing depth under the planned speed was predicted dynamically. Finally, the validity of the towed body was confirmed at sea experiment. In the sea experiment, the depth of each towed body was measured changing towing speed on both conditions with hose to pump-up water and without it. The depth at the case with hose decreased by about 60 percent to compared with the case without hose. The depth of the lower side body with hose reached 20.0 m when the towing speed was 3.3 kt. Based on these results, it was estimated that the towing speed to attain the depth of 20.0 m will increase to 5.0 kt by decreasing hose diameter from 18.0 mm to 8.0 mm, or increasing each body weight to 150.0 kg. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/54817 |
| Appears in Collections: | 北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第64巻 第1号
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