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Title: Dead-Volume Correction Dvc() For The Calibration Of Cfvns -- Differential Calibration And Optimum Estimation
Author: m. Ishibashi N. Kato H. Harada
Source: Flomeko 2016
Year Published: 2016
Abstract: The paper introduces differential calibration that estimates the dead volume correction (DVC) of a diverter valve without ambiguity (termed DVC0/DVC1). DVC0 and DVC1 have to f ix the condition of the exhaust line before suction. It is then replaced by a regression method on the basis derived by DVC0 to reduce the number of the measuring points required for the estimation (DVC1b). The paper also proposes another regression method that allows any exhausting condition (DVC2). It bases on the fact that the discharge coe fficient of a CFVN depends on the inverse of the square root of the Reynolds number in the laminar boundary layer regim e. Another direct measurement method (DVC3) is also proposed that can be applied to any conditions. These methods a gree with each other very well even between two diverter valves of different sizes.

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