著者

川橋 正昭 細井 健司 平原 裕行 塩崎 孝壽

出版者

社団法人 可視化情報学会

雑誌

流れの可視化 (ISSN:02873605)

巻号頁・発行日

vol.9, no.34, pp.317-320, 1989

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The Laser Speckle Velocimetry (LSV) is one of the most useful method of quantitative flow visualization, because it gives two-dimensional instantanious velocity distributions. But this method is not suitable for continuous measurement of unsteady flow, because normally the repetition rate of pulse laser is low.<BR>We have reported a new illumination technique by making use of CW laser, and named the Beam-Sweep Laser Speckle Velocimetry (BS-LSV). A plane of observation in a flow field seeded with tracer particles is illuminated by periodical one-way sweeps of a laser beam instead of pulsed light sheets. This method is suitable for measurements of an unsteady flow, because the sequential specklegrams can easily be recorded continuously.<BR>In this report, BS-LSV is applied to two-dimensional velocity measurements and visualization of pulsating flow in a peristaltic pump.