著者

有田 隆一 加瀬 篤志 大場 謙吉

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集B編 (ISSN:18848346)

巻号頁・発行日

vol.77, no.775, pp.823-831, 2011 (Released:2011-03-25)

参考文献数

5

被引用文献数

3

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The purpose of this research is to elucidate the mechanism of aerodynamic force generation and control in flapping flight of a mosquito. In this paper, a tenfold enlarged realistic model of the flapping wing was used to simulate the motion of the mosquito's wing and flow pattern around it. Experiments were conducted using a very low speed wind tunnel to coincide the condition of Reynolds and Strouhal numbers with those of real mosquito. The flow field around the wing model was analyzed by a stereo-PIV system. The aerodynamic forces generated by the model wings were calculated by using a momentum conservation law applied to the flow field. In these experiments, two unsteady ring vortexes around model wings were observed. The magnitude and direction of the jet flow induced by the ring vortex were greatly influenced by the attack angle. It was found that the lift was generated during the down-stroke and the thrust during the up-stroke in the real mosquito's flight.

著者

吉田 直之 加瀬 篤志 田地川 勉 板東 潔

出版者

一般社団法人 日本機械学会

雑誌

流体工学部門講演会講演論文集 2013 (ISSN:24242896)

巻号頁・発行日

pp._1202-01_-_1202-03_, 2013-11-09 (Released:2017-06-19)

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The purpose of this study is elucidating the mechanism of mosquito's flight. The motion of mosquito's wings consists of three representative motion; flapping, lead-lug and feathering motion. The feathering motion is a rotational movement which is centering on a wing leading edge. The mosquitoes are performing this motion passively produced by fluid forces and so on. In order to build the enlarged model which simulates this motion, we need to measure the stiffness of the mosquito's wings. The bending stiffness of the mosquito's wings were measured by the experiment using a cantilever. The enlarged wing model was designed based on its results. We observed the flapping motion of the enlarged wing model in the very low velocity wind tunnel and verified whether the feathering motion can be simulated.

著者

川口 清司 加瀬 篤志 堀田 裕弘

出版者

公益社団法人 日本工学教育協会

雑誌

工学教育 (ISSN:13412167)

巻号頁・発行日

vol.66, no.2, pp.2_48-2_53, 2018 (Released:2018-03-25)

参考文献数

8

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The upbringing of creativity, problem-identifying ability, problem-solving ability, and planning ability of engineers by using logical thinking is one of important problems for developing products in Japan. The upbringing of above abilities by using logical thinking is required for graduation research and master research in university. Therefore the authors planned and practiced the new subject “Advanced Exercises for Creative Designing toward Problem Solving” that performed master research by using logical thinking. In this education subject, students performed the investigation of conventional studies, the examination of problem-solving method, the planning of research and the conduct of research about their master researches by using logical thinking methods. The results of the questionnaire made it clear to be able to bring up creativity, problem-identifying ability, problem-solving ability, and planning ability by attending the subject.