Water irrigation of material in the layer leads to an increase in aerodynamic resistance.
Experienced data on an increase in the aerodynamic resistance of the layer are presented in the form of the dependence of the ratio of the coefficients of the sprinating in the presence and absence of irrigation of the layer of the layer with water, and the irrigation intensity is characterized by the crushing coefficient. For experiments with irrigation of the material in the layer, resistance coefficients were also calculated by the expression of the overlap of pores in the layer from the presence of moisture.
The calculation of the aerodynamic resistance of the irrigated layer from various materials is made according to the formula where the resistance coefficient for the dry layer is on the schedule of the schedule by the degree of increase in resistance on the presence of irrigation with the irrigation factor.
To assess the intensity of the processes of adiabatic moisture (direct evaporative cooling) of the air, the EA efficiency coefficient is used in terms of expression. The EA indicator characterizes the actual degree of decrease in air temperature in relation to the maximum possible, where the limit of direct evaporative cooling of the air is its initial temperature in the wet thermometer.
With the constant structure of the irrigated layer with an increase in air flow rate, EA efficiency coefficients decrease. Similarly, the transfer coefficients revealed the dependence of the EA indicators on the irrigation coefficient when ensuring complete wetting of the material in the layer.
A change in the structure of the filling layer has a significant impact on the value of the EA indicator. Experienced data on the increase in EA with an increase in volumetric weight of filling. The experimental dependencies obtained according to the author’s research on the effectiveness of EA.
