ADDITIVE MATHEMATICAL MODEL OF AERODYNAMICS IN ENERGY ADAPTOR OF RADIAL-FLOW FANS IN MINES

Ventilation installations are the most important element in the technological chain of health safety control in mines. Deep mine ventilation, especially with fans operating concurrently, is best supported by double-sided centrifugal fans featuring higher aerodynamic load in combination with enhanced capacity, lower acoustic power, easy servicing and operating reliability. Ventilation modes, varied with time and connected with organization of mining processes, require highly adaptable fans capable of economically efficient maintenance of required airing regime. On the other hand, the centrifugal fans equipped with axial or vortex distributors offer worse adaptability (Гψ = 0.55) as compared with the axial fans with rotating blades of impellers (Гψ = 0.7). Based on the review of the current methods and means for the improvement of mine fan adjustability using different controllers to maximize mine fan adaptability to mine ventilation regimes, this article presents the mathematical model of a radial energy adaptor. The design of the radial energy adaptor allows adjusting aerodynamic parameters of fans. The mathematical model of the energy adaptor aerodynamics is based on the additivity principle similar to the principle of superposition in hydrodynamics. The new mathematical model of of flow in the energy adaptor makes it possible to calculate geometrical parameters of the adaptor for the pre-set conditions of efficient adjustment of mine fans. The radial energy adaptor for aerodynamic parameters of mine fans has been trialed. The proposed device enables reduction in energy consumption of fans by 8 % and improvement of pressure adjustment by 15%, which is equivalent to the annual economic benefit comparable with the fan price.

Keywords

Turbomachines, mine fan, energy adaptor, aerodynamics, governing flow, turbomachine operation mode adjustment, turbomachine adjustability, turbomachine efficiency.

Issue number: 5
Year: 2018
ISBN:
UDK: 622.44
DOI: 10.25018/0236-1493-2018-5-0-171-177
Authors: Makarov N. V., Makarov V. N., Volegzhanin I. A., Ugolnikov A. V.

About authors: Makarov N.V., Candidate of Technical Sciences, Head of Chair, e-mail: mnikolay84@mail.ru, Makarov V.N., Doctor of Technical Sciences, Professor, Volegzhanin I.A., Graduate Student, Ugolnikov A.V., Candidate of Technical Sciences, Assistant Professor, Head of Chair, Ural State Mining University, 620144, Ekaterinburg, Russia.

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