Discharge Coefficients of Float-Area-Type Flow Meters
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概要
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In this paper, in order to improve the measuring accuracy of this kind of flow meter, it is experimentally pointed out that the commonly used discharge coefficients of float-area-type flow meters do not always have constant values over a wide range of characteristic Reynolds number even in the region of Re larger than critical characteristic Reynolds number Rec. It is shown that only in the case of the floats having special shapes or geometrical dimensions the discharge coefficients of this kind of flow meters have constant values independing on the non-dimensional position of float. When employing such float, semi-empirical formula to predict the flow rate characteristics is obtained, and the limits of applicability of the formula are experimentally explained.
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