THE DEFINITION OF SPATIAL HETEROGENEITY OF FLOW OF LIQUIDS AND GASES BASED ON ESTIMATION OF PROBABILITY DISTRIBUTION CURVES-SPEED MISMATCH IN CROSS SECTIONS
DOI:
https://doi.org/10.20535/2305-9001.2014.71.35569Keywords:
measurement, flow rate, fluid, gas flows, fluid dynamicsAbstract
In this work were described the analysis of actuality and problems of flow rate and volume measurement of energy resources and water, defined the basic requirements for fitted and counters of liquids and gases, lists ways of enhancing their metrological characteristics of a measuring process efficiency. The factors of influence on the metrological characteristics of measuring transducers and the main flow of them. It is shown that the quality measure is severely affected by hydrodynamic characteristics of measured liquid and gas flows, and especially their heterogeneity, including diagrams of asymmetry in the distribution of velocity in cross section measurement channel.
The method for determining the degree of heterogeneity velocity in cross sections of the piping before and after measuring transformer and in measuring chamber converter with subsequent impact assessment of heterogeneity flow on the metrological characteristics of measuring tools. The developed technique includes estimating the chance of a mismatch in speed distribution curve cross sections. The results of such evaluation recommendations on the improvement of the transducers and the place of their installation on the node counting, that aim to reduce errors of measuring devices and systems for liquid and gas flow rate and volumeReferences
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