Elucidation of the design method for the uneven shape of a corrugated blade wind turbine with flexibility that will not break even in strong winds

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04231
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18030:Design engineering-related
• Research Institution: Nippon Bunri University
• Principal Investigator: Harada Atsushi 日本文理大学, 工学部, 准教授 (40612023)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 流体工学 / エネルギー工学 / 風力発電 / バイオミメティクス / 自然エネルギー

Outline of Final Research Achievements

This research is about wind power generation with a corrugated blade turbine that imitates the wings of a dragonfly. This wind power generation device can obtain stable output in low wind speed areas. However, due to the flexible blade structure, there is a problem that it breaks in strong winds. In this study, we focused on the breakage of turbine blades in strong winds. In field experiments, experiments were conducted in an environment with strong winds of over 20 m/s when a typhoon passes, but no breakage occurred. It was revealed that breakage occurs at wind speeds lower than initially expected. When experiments are conducted at the same wind speed using a wind tunnel device, it is shown that there are areas where the turbine blades vibrate violently and efficiency drops significantly.

Free Research Field

設計工学

Academic Significance and Societal Importance of the Research Achievements

自然エネルギの利用は、環境問題の観点などから注目されている。また、災害が発生した場合などの非常電源に活用することなども活用が見込まれている。本研究は、これまで比較的大規模な発電様式とは異なり、数W程度の小規模な発電領域おいて有効な技術である。この研究により、さまざまな条件で安定した発電を行い、さらに破壊および故障を避けることができる設計手法の手がかりを明らかにすることができた。今後は、共振点をずらす設計手法を明らかにすることによって、幅広い利用を行うことが可能になることが期待できる。