Experimental study on atomized particle size as affected by airflow disturbance at the heading face
Abstract：An experimental measurement of airflow disturbance to a spray of atomized particles is presented. Atomized particle size at the heading face was determined for two common pres- sure nozzles affected by 0.4 m/s airflow. It was observed that increased pressure, reduced axi- al distance from the nozzle, and reduced distance from the axial center line of the nozzle will cause the atomized droplet size to decrease. The airflow causes an overall increase in droplet size by less than 23 /μm. The average relative size range, As, is reduced by 0.06, the average D10 drops by 1.12%, and the size within the center of the spray field decreases by 6.38 to 8.51 percent in the presence of the airflow. This information was used to improve the road header external spray. The water pressure was increased from 2 MPa to 8 MPa, the nozzle distance to the cutting head was reduced from 1.55 to 1 meter, and the spray cross-section was faced to where the cutting head contacted the coal. Experimentally it was observed that the total and re- spirable dusts were reduced by 60.5 and 62.8 percent, respectively, at the heading face by im- plementing these changes.
Keywords：heading facesprayatomized particle sizeairflow disturbancedust
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 378-383 )