The Hydrodynamics of Translational−Rotational Motion of Incompressible Gas Flow within the Working Space of a Vortex Heat Generator

Valeriy Nikolsky, Roman Dychkovskyi, Edgar Cáceres Cabana, Natalia Howaniec, Bartłomiej Jura, Katarzyna Widera and Adam Smoliński
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Valeriy Nikolsky: Department of Energetic, Ukrainian State University of Chemical Technology, 49000 Dnipro, Ukraine
Roman Dychkovskyi: Department of Development & Research, Dnipro University of Technology, 49027 Dnipro, Ukraine
Edgar Cáceres Cabana: Scientific Research Institute of the Center of Renewable Energy and Energy Efficiency, Universidad Nacional de San Agustin de Arequipa, Arequipa PE-04000, Peru
Natalia Howaniec: Department of Energy Saving and Air Protection, Central Mining Institute, Plac Gwarkow 1, 40-166 Katowice, Poland
Bartłomiej Jura: Department of Mining Aerology, Central Mining Institute, Plac Gwarkow 1, 40-166 Katowice, Poland
Katarzyna Widera: Department of Economics, Finance, Regional and International Research, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland
Adam Smoliński: Central Mining Institute, Plac Gwarkow 1, 40-166 Katowice, Poland

Energies, 2022, vol. 15, issue 4, 1-14

Abstract: The paper presents the results of analytical and experimental studies of the hydrodynamics of the translational−rotational motion of incompressible gas flow within a working space of a variable-geometry vortex heat generator. The terminal velocity and pressure have been identified analytically. The effect of vortex generation on the ratio of the parameters has been analyzed. A mathematical model has been developed with a simplified design scheme that simulates the movement inside a vortex channel with fixed elements. On the basis of mathematical modelling, the influence of the apparatus-constructive (AC) design of the working space of a vortex heat generator on the generation of vortices inside the apparatus has been analyzed. The influence of the main geometric and hydrodynamic parameters of the device on the indicators of its energy efficiency has been investigated. The obtained models show the critical regions where the most intense cavitation zones are possible. An analysis of the hydrodynamics of the incompressible gas motion within the working space of the newly designed vortex heat generator with variable geometry has helped define both the terminal velocity and pressure. In addition, the effect of the facility geometry on the generation of vortices favoring cavitation was determined. The model studies have been carried out in terms of liquid loading changes in the 0.001–0.01 m 3 /s range. The changes in a velocity field within a working channel have been analyzed for the channel geometry, where a cone angle γ is 0° to 25°, with 130, 70, and 40 mm widths for the working channel. It has been identified that a sufficient axial symmetry of the heat carrier along a vortex accelerator enables the heat carrier inlet through a turbulizing nozzle. The dependence of the nozzle area, the effect on the efficiency of the vortex heat generator angle of attack of the vortex accelerator, and the ratio of the length and diameter of the vortex zone of the heat generator to its energy efficiency in general have been defined experimentally. These studies could be instrumental in the design of vortex heat generators whose geometry corresponds to the current requirements concerning energy efficiency. It has been found that the geometry of the vortex accelerator improves the operation of the heat generator by 35% in comparison with similar available designs.

Keywords: vortex heat generator; translational?rotational motion of a flow; heat energy; electrical energy; terminal velocity; mathematical model; cavitation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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