DEVELOPMENT OF ADJUSTIVE FANS FOR LOCAL VENTILATION ON THE BASIS OF A MODIFIED ADDITIVE MATHEMATICAL MODEL

Further stimulation of mining operations, application of innovative technologies that ensure efficient extraction androcessing of mineral raw materials are limited by requirements for an aerogas dynamics safety system, one of the energy-intensive elements of which are mine turbo-machines; they are characterized by inadequate adaptability and aerodynamic loading. Purpose. On the basis of the theory of bound vortex, conformal mapping method and singularity method by S.A. Chaplygin, there is an aim to develop an additive mathematical model of a rotating circular grating of aerogas dynamics profiles with fluid control of circulation, to formulate and solve the problem of its aerodynamic calculation, to prove the uniqueness of the solution up to a constant. Methods of research. It is shown that the terms of Zhukovsky-Chaplygin-Kutta are applicable to the calculation of airgas-dynamic profiles provided that there is no attached vortex at the rear salient point of the profile. An equation is derived for calculating the circulation of the circular grating of aerogas dynamics profiles as functions of the energy parameters of the sources and sinks of the swirl-chambers. It is established that the aerodynamic coupling of the cavity of the turbo-machine with swirl-chambers, causing the dependence of the energy parameters of the source and sinks of fluid control on the characteristics of the external network, provides a significant increase in the adaptability of mine turbo-machines. Results. Modification of the theory of aerodynamic calculation of circular gratings of aerogas dynamic profiles and formation of radial aerodynamic schemes with increased adaptivity made it possible to formulate a qualitatively new direction for improving mine radial turbo-machines. Their operating principle corresponds to nature-like technologies of energy conversion and transmission. The method is proposed for increasing the pressure developed by mine turbo-machines, their economic efficiency and adaptability through the use of swirl-chambers integrated in the impeller blades, which perform the functions of adjustive fluidic device for circulation control. Application area. With the use of the proposed method, a direct-flow radial-vortex fan VRVP-12A was developed for aerage of blind workings up to 3500 m long.