With the intensive development in recent years of applied software in the field of studying and modeling hydromechanical processes, the authors of the article have carried out research by means of mathematical modeling of the design of a turbine flow meter (TFM) for oil and petroleum products in order to ensure the greatest stability of metrological characteristics. As a result of the analysis, the TFM parameters were identified that are most capable of affecting the stability of the conversion coefficient. An analytical hydromechanical model based on the theory of axial turbomachines has been developed to determine the degree of their influence on the stability of the conversion coefficient, as well as to predict its value depending on changes in the design of the TFM. In contrast to blades, in turbomachines, TFM blades operate at low angles of attack, and design optimization works are aimed at obtaining stable metrological characteristics in specified ranges of flow rate and viscosity of the pumped medium. In the process of computer implementation of the mathematical model, the structural characteristics of the TFM, which have the greatest effect on the stability of its metrological characteristics, were established, and the value of the conversion coefficient was predicted in all calculated ranges of flow rate and viscosities.
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