Flow Visualization Experiments Around a Flying Toy "Taketombo" for PBL Education

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  • PBL教育としての竹とんぼまわりの流れの可視化実験

Abstract

<p>We have implemented PBL program for the purpose of providing students with basic skills on how to learn fluid mechanics. This PBL consists of three sessions. Firstly, the students make a flying toy "taketombo". Secondly, a flight test is performed using the "taketombo". And finally, the students modify the "taketombo" according to the result of the flight test. It has been proven that this PBL can become an important way to understand the aerodynamic features of the "taketombo" to the students. However, it is difficult to give profound knowledge of fluid mechanics to the students due to lack of information about the fluid motion around the "taketombo". Accodingly, we attempt to add a flow visualization around the "taketombo" to the program of PBL. In this paper, we demonstrate new PBL sessions in which the students design a system for visualizing a flow field around the "taketombo" based on tracers provided by a haze maching, a sheet light device and a mechanical launching device, and implement the system using 3DCAD and 3D printer. And several visualzation experiments are carried out as the last session of the PBL.</p>

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