The analysis of longitudinal and expansion velocities in the focusing tube of abrasive waterjet cutting head

Abstract

After the rearrangement of equations used in the presented article, the calculation of mean longitudinal velocities along the path of the jet was made more accurate. The rearrangement of equations consists in the determination of a constant in the equation for calculation concerning the initial section of the jet by using an equation by Hlaváč. On the basis of analysis of longitudinal velocities in the cutting head, the mean value of expansion velocity that can be used for the calculation of pressure below atmospheric pressure in the mixing chamber was determined.