光学式変換器を用いた回転振動板式渦流速計の研究

概要

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A velocimeter consisting of a thin rectangular plate performing revolving vibration caused by Karman vortexes is studied to measure the flow velocity from the vibration frequency of the plate. The revolving plate provided with a splitter-plate behind it with a several mm gap between the vibrating plate and with a stopper which limits the amplitude of the revolving vibration of the plate is found to conduct a satisfactorily sinusoidal vibration with the same frequency as the shedding Karman vortexes. The frequency of the plate vibration is measured by use of LED and a optical sensor of photo-diode. The obtained results are that, first, the frequency of the plate vibration is linearly proportional to the flow velocity and, secondly, this velocimeter measures accurately the gas velocity down to 1 m/s and is also suitable to hot gas velocity measurement.
一般社団法人日本機械学会の論文
1989-01-25