Method of effective circulation control of high speed fans impellors

Abstract

Research relevance. The high-level competitiveness of Russian oil and gas sector enterprises in the global economic space is impossible to reach without accelerating the restructuring of existing air-cooling apparatuses and developing new ones. It should be carried out with regard to modern technology introduction and advanced achievements in mining. The cost of gas cooling during its transportation via main gas pipelines in the cost structure reaches 22%. Besides, annual energy wastage on compressed gas cooling by fan installations is commensurate with the cost of the air cooling devices. It is essential to develop active means of air conditioning units control in order to improve their efficiency and aerodynamic adaptability that affect the competitiveness of oil and gas enterprises. ISSN 0536-1028 «Известия вузов. Горный журнал», № 4, 2021 99 Research aim is to develop a mathematical model for fan unit parameters active control. Research methods are based on the experimentally proven hypothesis about the dependence between the control flow rate on the impeller blades and the position of the rear critical points of the blades. Research results. A method was developed based on conformal transformations, the theory of residues, singular equations, and hydrodynamic analogy. The dependence between the position of the profiles critical points and flow circulation was obtained. The dependence of the aerodynamic adaptability of the fan units in air conditioning devices on effective critical point position and the energy characteristics of the impeller blades flow controlling source has been established. A patent was obtained for the fan unit impeller with active circulation control from air flow sources from the fan casing. High efficiency of the developed circulation control method for increasing the operational efficiency and aerodynamic adaptability of air-cooled fan units has been proved. An aerodynamic scheme of ОV 121TN was developed. A fan unit OGM VU2.7-1.8K4 with aerodynamic adaptability increased by 34% was created.