Patented technological designs that implement vortex control of air flow in the blade passages of the impellers of radial ventilators with adaptive vortex generators in order to increase ventilation efficiency at industrial enterprises are investigated on the basis of results of development studies. A technique for the design of radial ventilators with adaptive vortex generators is proposed on the basis of the method of conformal transformations with the use of the theory of adjoint vortices, the aerodynamics of bodies with air flow, and the theory of a function of a complex variable.

Construction and operation are described for overseas tubular belt conveyer (TBC) systems. Distinguishing features are established for turning over the lower run of the conveyer belt and the main fundamental limitations for TBC parameters. Technical characteristics for the domestic rubberized-fabric belt used, properties and transportation conditions for loads of the building industry TBC are presented. The advantages of TBC over belt conveyers are listed.

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The basic equation of dynamics characterizing the behavior of particles in a collision with a separation surface is presented. Results of a calculation of the angle and velocity of reflection and the time and horizontal coordinate of incidence following the impact of particles of certain materials (coal shale, asbestos) are presented.