Reproducibility of Velocity Profiles in Gas Flow Metering Units under Complex Gasdynamic Conditions

Abstract

The efficiency of four modifications of flow conditioners in terms of smoothing velocity profiles and ensuring their reproducibility with varying flow history and turbulence intensity at low Reynolds numbers was experimentally studied. The relevance of the work is due to the problem of increasing the accuracy of gas flow measurement in complex gas-dynamic conditions, especially in the region of laminar–turbulent transition. An approach has been identified that allows for the leveling of velocity profile deformations in a wide range of flow histories with a flow turbulence level not exceeding 14% and down to a lower Reynolds number value of 943.