At present, different types of flow transducers are used for volumetric flow metering of oil in the crude quality control system (CQCS). Calibration facilities are used as part of CQCS to calibrate and verify metrological characteristics of flow transducers. In recent years, mechanical displacement meter provers (MDMP), predominantly foreign-made, are being used most frequently at the facilities of domestic oil companies. As the analysis of the regulatory and technical framework has shown, the Russian Federation currently lacks uniform technical and metrological requirements for MDMP, as well as experience of in-house production.
The paper presents the results of comprehensive scientific studies aimed at substantiating the lengths of acceleration and calibration sections of MDMPs for the creation of domestic installations. To solve this task, experimental studies were performed at 10 operated MDMP. The experimental results were compared with the results of the calculation of lengths of the MDMP acceleration sections within the frames of six hypotheses. The development of hypotheses was carried out according to the analysis of the results of previously performed scientific studies and theoretical calculations. Based on the obtained data, the shortest length of the acceleration sections of MDMP ensuring metrological characteristics of the MDMP was substantiated with guaranteed stabilization of the ball piston velocity in MDMP to the beginning of the calibrated section; and the minimum lengths of calibrated sections for MDMP of different capacities were calculated as well. The obtained results are applied in mathematical modeling of MDMP in the ANSYS applied software as part of the CFD computational fluid dynamics and Mechanical Enterprise strength calculations packages as part of MDMP production.
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