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Title: Dynamic Temperature Effects In A Clearance-Sealed Piston Prover For Gas Flow Measurements
Author: J. Kutin G. Bobovnik I. Bajsic
Source: Flomeko 2013
Year Published: 2013
Abstract: This paper deals with the dynamic temperature effects in a high-speed, clearance-sealed realization of a piston prover. A dynamic mathematical model was built to study the temperature variations and to estimate their influence on the flow measurements. The mathematical model is formulated on the basis of lumped-element models of the piston and the gas cavity. The energy balance for the gas cavity includes the convective heat exchange with the surroundings. One of the potential effects results from the temperature differences between the inlet gas flow and the cylinder wall. In addition, the piston provers operation generates dynamic temperature variations, which are mainly related to the pressure change due to the flow redirection and to the pressure oscillations due to the pistons resonance effects

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