1 0 0 0 OA A209 尺八演奏時の呼気流れのダイナミックPIV計測
- 著者
- 染矢 聡 岡本 孝司 飯田 将雄
- 出版者
- 社団法人 可視化情報学会
- 雑誌
- 可視化情報学会誌 (ISSN:09164731)
- 巻号頁・発行日
- vol.26, no.Supplement1, pp.117-118, 2006-07-01 (Released:2009-07-31)
Any wind instrument can sound due to the vibration of the air, expiration flow inside of the wind instrument. In case of a trumpet or a clarinet, a mouth or a reed helps to sound variable tones. In case of a flute, there is no mechanical vibration. We would like to investigate more detail about the flow and the vibration with sound inside or outside of the flute, in order to understand the mechanism of the wind instrument and to aid in the manufacture of the good instrument. In this report, a Japanese traditional bamboo flute was used in the experiment. The dynamic PIN technique was applied to measure the vibration. 2 kinds of experiments were done. The Argon-gas flow with different tone inside/outside of the bamboo flute was measured using a high frequency pulse laser. Oil mist was used as the tracer particles. Then, we also tried to measure the flow in bamboo flute when a human player played, using a CW-laser and the water-mist as the tracers. We successfully measured that the periodical flow near a hole of the bamboo flute went out from and came into the flute at 200-500Hz dependent on the tone.
- 著者
- 杉井 康彦 西尾 茂 岡本 孝司 中野 厚史 南山 求 新見 英幸
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B (ISSN:03875016)
- 巻号頁・発行日
- vol.70, no.691, pp.701-706, 2004-03-25
- 参考文献数
- 18
- 被引用文献数
- 2
Blood flow in microvessels, such as arterioles, capillaries and venules, whose diameter ranges from 5 to 50μm, is responsible for the maintenance of tissue and organ functions. The measurement of microvascular blood flow velocity with high measurement accuracy is essential for basic and clinical studies in the assessment of flow shear stress at the vascular wall in relation to substance exchange between blood and tissue. This paper aimed to evaluate the velocity field of blood flow in microvessels with high spatial and temporal resolution. By using micro PIV system, the velocity distributions of red blood cells flowing in rat mesenteric arterioles, including near the wall in the axisymmetric plane, were obtained. Ensemble averaged time-series of velocity profiles in the cross-sections were calculated for comparison. It was shown that the arteriole velocity profile was blunt in the center region of the vessel cross-section while it was steep in the near wall region.
- 著者
- 生田 香明 島本 英樹 坂東 隆男 杉江 正敏 岡本 孝信
- 出版者
- 社団法人日本体育学会
- 雑誌
- 日本体育学会大会予稿集
- 巻号頁・発行日
- no.59, 2008-09-09
