| Article |
|---|
| Article name |
Increasing the Aerodynamic Loading of Gas-Suction Fans Based on Nature-Like Proportionality for Intensifying Coal Mining |
| Authors |
Nurkhozhaev E.S. chairman of the Management Board, Rus.akhmetov@mail.ruMakarov V.. , Makarov N.. , Akhmetov R.G. chief mechanic, info@km.kz |
| Bibliographic description |
Nurkhozhaev E. S., Makarov V. N., Makarov N. V., Akhmetov R. G. Increasing the Aerodynamic Loading of Gas-Suction Fans Based on Nature-Like Proportionality for Intensifying Coal Mining // // Transbaikal State University Journal. 2025. Vol. 31, no. 1. P. 51–59. DOI: 10.21209/2227-9245-2025-31-1-51-59 |
| Category |
Earth and Environmental Sciences |
| DOI |
622.23.05 |
| DOI |
10.21209/2227-9245-2025-31-1-51-59 |
| Article type |
Original article |
| Annotation |
Classic aerodynamic schemes of centrifugal fans have currently reached their theoretical limit in terms of aerodynamic loading, which does not allow increasing the energy efficiency of gas suction fans. The object of the study is presented by gas suction fans, designed for combined ventilation of gas-rich coal mines. The purpose of the work has become the aerodynamic loading increasing of gas suction fans by forming a flow around the blades of their impellers by analogy with the flow around natural objects. The following tasks are solved: to construct formulas for the efficiency criterion of the force aerodynamic interaction of the air flow with the blade profiles of the impeller of the gas suction fan; to formulate a method for calculating the sources of control over the force aerodynamic interaction efficiency of the air flow with the blade profiles and to verify the proposed method for calculating the aerodynamic scheme. The proven hypothesis of N. E. Zhukovsky, according to which the lift force of an airfoil is determined by the vector product of the air flow velocity and its circulation, is adopted as the basis for the “mechanical” nature-likeness of the aerodynamic interaction of the blade profiles of a gas-suction fan working wheel and the air flow. The formulas are obtained that establish the relationships between the nature-like proportionality of the vortex flow intensity around the blade profiles of the gas-suction fan rotating working wheel with the diffuseness of the air flow, the intensity of sources on their surface, and aerodynamic and geometric characteristics. Based on biholomorphic pore formations of the flow around profiles with sources on the Riemann plane, the theory of homology singularity, and N. E. Zhukovsky’s hypothesis, the dependencies of the aerodynamic parameters of the force interaction of profiles with sources with the air flow are constructed. The gas-suction fan UVCG-9P, designed and manufactured on the basis of the proposed mechanistic approach to nature-like proportionality, has confirmed its high reliability and efficiency. The growth of the aerodynamic loading coefficient from 0.96 to 1.25 constitutes 30 %, while the efficiency increased from 0.75 to 0.86 and exceeds the indicators of the most advanced fans of the English company Keith Blacman Limited type 95M.
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| Key words |
profile, blade, impeller, gas-suction fan, source, velocity circulation, acceleration circulation, Riemann plane, biholomorphic transformation, aerodynamic loading, nature-like proportionality |
| Article information |
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| References |
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