Investigation of the effect of the fan equalizing device model on the supply air jet distribution

Abstract

Microclimate parameters significantly affect animal survival and productivity. The design of microclimate systems is carried out according to the averaged indices. In the process of operation, it is important that the microclimate parameters have optimal parameters in the zone of animal housing and throughout the area of their management. From economic point of view, jet ventilation systems are the most optimal ones. The analysis of the jet ventilation systems of swine houses showed that the existing structures provide average microclimate indices in terms of the volume of the room, but in individual boxes and in terms of the height of the room may vary greatly. Based on this, it became necessary to investigate the influence of the equalizing device in the design of the supply fan of the swine house microclimate system on the supply air jet distribution. To solve the problem, the design of the equalizing device of the supply fan was developed and manufactured. Theoretical calculations have shown that the key factor affecting the jet parameters is the dimensionless turbulence coefficient. Experimental studies of the operation of the proposed equalizing device showed a decrease in the turbulence of the inflow jet, its alignment, a decrease in the taper angle of the jet in the initial section almost 2 times to 34°, an increase in the range by 54%.