DEVELOPMENT OF MINE AXIAL FANS WITH INCREASED PERFORMANCE IN REVERSE MODE
P. V. Kosykh, A. M. Krasyuk
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Main mine fan, axial fan, fan reversal, fan aerodynamic configuration
Abstract
In this paper, an approach to create reversible mine axial fan with inlet guide vanes is considered. In this approach, the guide vanes rotate and operate as an impeller in the reverse mode, while the impeller slows down and works as guide vanes. To increase the operating efficiency in the reverse mode, the blades of the impeller and inlet guide vanes are turned at certain angles not exceeding 65°. To determine the turning angles of blades in the reverse mode, theoretical dependences were used, according to which the angles of flow rotation in flat gratings composed of blade profiles were calculated at the middle radius. The range of turning angles of the blades for the reverse mode is determined for fan configurations with a hub tip ratio of 0.6 at different flow and theoretical pressure coefficients. The characteristic in the reverse mode is numerically determined by the example of one fan.
|
