METHOD OF CALCULATION OF PARAMETERS OF THE VORTEX CHAMBER OF FANS OF LOCAL VENTILATION OF COAL MINES
In this paper we propose an effective method of increasing the aerodynamic loading of adaptability and local ventilation fans. The method for calculating the energy performance and the geometric parameters of the vortex chambers built into the blade impellers was developed. Using the method of complex integration, similarity criteria for the boundary layer and on the basis of the potential steady airflow around a formula was obtained for calculating the pulse of vortex sources, providing the displacement of the point of boundary layer separation in the rear stagnation point of the profile. This helps to eliminate the vortex and, as a result, increases the pressure developed by the fan and its efficiency. Experimental research has confirmed the accuracy of the equations obtained and helped to establish the area of sustainable elimination of vortex.