Izvestiya MGTU MAMIIzvestiya MGTU MAMI2074-05302949-1428Moscow Polytechnic University32170810.17816/2074-0530-321708Research ArticleInvestigation of cavitation properties of a mobile pumping unitKonshinDmitry S.<p>Master, Specialist</p>konmitya@yandex.ruhttps://orcid.org/0009-0002-3744-1224KonkeyevEvgeniy M.<p>Master, Specialist</p>evgeniikonkeev@gmail.comhttps://orcid.org/0009-0002-4518-8783ProtopopovAlexander A.<p>Cand. Sci. (Phys.-Math.), Associate Professor of the Hydromechanics, Hydromachines and Hydro-Pneumoautomatics Department</p>proforg6@yandex.ruhttps://orcid.org/0000-0002-6069-7730PetrovAlexey I.<p>Cand. Sci. (Tech.), Associate Professor of the Hydromechanics, Hydromachines and Hydro-Pneumoautomatics Department</p>alex_i_petrov@mail.ruhttps://orcid.org/0000-0001-8048-8170CNP RusOTKRITIE Bank (VTB Group)Bauman Moscow State Technical University2406202317117242803202331032023Copyright © 2023, Eco-Vector2023<p><strong><em>BACKGROUND</em></strong><em>:</em> In the introduction to the article, a review of publications on cavitation, vibration and noise in centrifugal pumps, including the issues of cavitation erosion of impellers, is carried out.</p>
<p><strong><em>AIMS</em></strong><em>:</em> Comparison of cavitation properties of a centrifugal pump of a mobile pumping unit with and without a pre-engineered screw by computational fluid dynamic (CFD) modeling.</p>
<p><strong><em>METHODS</em></strong><em>: </em>The calculation of the flow part of a pre-injected impeller stage is described and the CFD model of its hydrodynamic simulation is described. In the CFD model, Navier-Stokes equations averaged over the Reynolds number and the working fluid continuity equation were used. A two-phase fluid model was used to simulate cavitation.</p>
<p><strong><em>RESULTS</em></strong><em>:</em> The final results of the calculations carried out in the above models are presented. Calculations were obtained for a pump with impeller with and without an upstream stage (screw). For the impeller without a screw, the cavitation margin of 4.7 m was obtained, which is critical for such a pump. For a pump with an impeller with an upstream auger the cavitation margin is 1,7 m, that is much better and allows to show efficiency of such solution.</p>
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