Research on automatic maneuverability of quadmaran vessel for faster and efficient sailing to improve cruising distance

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02376
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 24020:Marine engineering-related
• Research Institution: Osaka Metropolitan University (2022); Osaka Prefecture University (2020-2021)
• Principal Investigator: Nihei Yasunori 大阪公立大学, 大学院工学研究科, 准教授 (00470055)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 船舶海洋流体力学

Outline of Final Research Achievements

The purpose of this research is to develop a sail suitable for sailing aiming at the extension of the operation time of the quad-maran vessel. As a sail, this study proposed a telescopic sail based on the two-element wingsail, in which two symmetrical wings are arranged in a row. Through a wind load test, while it was clarified that increasing the flap angle increases the lift force, which is the propulsion force of the trimaran yacht, but does not increase the lateral force, and yaw moment that hinder sailing. In addition, by installing a sail with a wing area of 2m2 on the trimaran, VPP indicated that the maximum ship speed is 0.88m/s under the assumed wind speed of 3.5m/s, and the maximum upwind speed component becomes 0.43m/s when sailing in the direction of 49.1degrees. The GM of the yacht was 1.79m. A simple test on water using the manufactured trimaran yacht confirmed that it could navigate in a tailwind at about 0.3m/s and in a direction of 90 degrees against the wind.

Free Research Field

船舶海洋工学

Academic Significance and Societal Importance of the Research Achievements

水産養殖場の現場において自動で面的に水質を計測する小型の船が求められている。海面養殖場は広く、数km×数kmオーダーの場合もある。小型船が風エネルギーを有効利用することにより長距離移動が可能になる。帆走化の技術によりこれまでどこにもなかった養殖場で用いる環境に優しい次世代船の展開が出来るのではないかと考えた。水産資源は減少の一途をたどっており養殖漁業に大きな期待が寄せられる。環境に優しい水産業の支えとしてセーリング型ロボット船を自動水質調査船として普及させ、海面養殖漁業に貢献することが可能となる。