Newsletter  2022.11  Index

Theme : "20th The Dream of Flow Contest” Preface Byungjin AN, and Masaaki MOTOZAWA Report on the 20th Dreams of Flow Contest Motohiko NOHMI (Ebara Corporation) Investigation into efficient ventilating methods Yoichiro TAMADA, Shota YOSHIDA, Naoya OHBA, and Kohei KUYAMA (Waseda University) Amazing Liquid Metal Crown Ryuto ONOZUKA, Ryunosuke NISHIO, Kenshi OHNO, Ken HAYASHIDA, Ryuhei MUTO, and Toranosuke HORIKAWA (Tokyo Institute of Technology) The Dream of Flow Contest Retrospective Shunya UDA, and Yoshiharu KANETA (Nihon University) Demonstration of Portable electrical tomography system and its application  So SEGAWA (Chiba University)

 

The Dream of Flow Contest Retrospective

Shunya UDA	Yoshiharu KANETA
（Nihon University, Team：MECST）

Abstract

We participated in "The 20th Flow Dream Contest" of which the theme is to talk about the trend to achieve a safe, peaceful, and secure society. Our concept of the work is Propose a windmill deformation mechanism that enables continuous power generation even in strong winds (to replace thermal power generation). We have devised six different deformation mechanisms for both horizontal and vertical axis wind turbines. The company successfully produced and demonstrated a movable model with a deformation mechanism inspired by familiar objects such as train pantographs and lanterns. We received the Excellence Award for our proposal of a new and dreamy mechanism.

Of course, it did not start spinning from the beginning, and it was a continuous process of trial and error, including setting the angle of attack of the blades and selecting the airfoil shape, until it functioned as a wind turbine. The frame was made from an easily reassembled commercial craft kit, and the bearing housings and wings were made with a 3D printer. The wing mounting stays were designed to allow for any mounting angle and were fabricated by a laser cutter. These innovations to accommodate design changes enabled us to achieve high-speed development and complete all six units in just half a month.

During our presentation, the movie showing the rotation of each deformation mechanism of the wind turbine stopped working due to a trouble. It was not possible to restore the video during the presentation, and we had to give only a verbal explanation, which was very frustrating. However, we cannot thank enough the audience who stopped by the demonstration to watch the video and ask questions. There were many things left undone due to lack of time, such as measurement of rotational force fluctuations caused by deformation of each wind turbine and quantitative comparisons. I'd love to try it if I get the chance.

Key words

 Windmill, deformation mechanism, generation (e.g. power), renewable energy, rotary machines

Figures

Figure 1　Windmill models

Figure 2　Wing mounting stay

Figure 3  Flame