Effects of inclination of a clearance-sealed piston prover on the leakage flow rate

G. Bobovnik, J. Kutin

Abstract

The leakage flow rate represents one of the most important contributions to the uncertainty of the measured gas flow rate at the bottom limit of the measuring range in a clearance-sealed piston prover. In order to successfully minimize its uncertainty contribution, it is necessary to understand the effects related to the reproducibility of the piston's travelling path relative to the cylinder and to the ability to position the piston prover in the ideal vertical position. The paper deals with an experimental study of the leakage flow rate in the inclined piston prover. The test results show that the leakage flow rate slightly increases with the inclination of the flow cell and that the leakage flow rate is correlated to the pressure inside the flow cell of the piston prover. The results indicate that such relationship could also be applied for predicting the leakage flow rate in a non-inclined piston prover.

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IMEKO-TC9-2019-062.pdf

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IMEKO TC

TC9 - Flow Measurement

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