1804 UVPを用いたバッフル周りの流れの実験的研究(OS18-1 超音波を利用した流動場の計測,オーガナイズドセッション)
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概要
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Effect of an intermediate standing baffle on the flow structure in a rectangular open channel has been studied by using Ultrasonic Doppler Velocimetry (UVP). Distributions of time-averaged on-axis velocity profiles at different streamwise positions indicate the flow structure of the uprising flow at the upstream of baffle and specifically vortex shedding at the downstream of the baffle. Importantly, comparison of space-dependent power spectra of upstream and downstream sections of the baffle indicates the existence of some peak structures near the baffle's edge for downstream sections which are corresponding to the periodic nature of flow concentrated mainly near the baffle's edge in the spatio-temporal velocity distribution. Such peak structures could not be observed for the upstream sections. For downstream sections mainly the existence of peak values in the space distribution of two frequency modes near the baffle's edge could be confirmed which can be attributed to the vortex shedding.
- 2009-11-06
著者
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Murai Yuichi
Graduate School Of Engineering Hokkaido University
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TASAKA Yuji
北大
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Murai Yuichi
Division Of Energy & Environmental Systems Graduate School Of Engineering Hokkaido University
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Tasaka Yuji
Division of Energy & Environmental Systems, Graduate School of Engineering, Hokkaido University
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Jamshidnia Hamidreza
Division of Energy & Environmental Systems, Graduate School of Engineering, Hokkaido University
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Takeda Yasushi
Division of Energy & Environmental Systems, Graduate School of Engineering, Hokkaido University
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Jamshidnia Hamidreza
Division Of Energy & Environmental Systems Graduate School Of Engineering Hokkaido University
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Tasaka Yuji
Graduate School Of Engineering Hokkaido University
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MURAI Yuichi
Division of Energy & Environmental System, Graduate School of Engineering, Hokkaido University
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