Abstract
The paper discusses the energy-transformation efficiency during the formation of high-speed waterjets, and during the mixing of solid particles and air into high-speed waterjets with velocities up to 850 m/s. The measurements are basically impact-force measurements on high-speed waterjets and on high-speed three-phase slurries. In detail, the energy transfer during high-speed waterjet formation, air mixing-and-acceleration, solid particle mixing-and-acceleration, and during abrasive waterjet (AWJ) formation have been analysed. The measurements are performed by using a piezoelectric dynamometer. It is found that this technique can be applied successfully to analyse the jet and slurry formation processes in AWJ systems. The results are compared with results obtained from laser-based jet velocity measurements.
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