Ultra-High Pressure Waterjet Removal of Thermal Spray Coatings

Abrasive waterjet cutting of a titanium alloy: The influence of abrasive morphology and mechanical properties on workpiece grit embedment and cut quality

“…At the orifice, the pressure energy of water is converted into kinetic energy. If one ignores the compressibility of water (which could be up to 15% at 350 MPa according to Singh et al (1992)) and losses (due to turbulence and other related phenomena) at the orifice, Bernoulli's principle can be used to estimate the jet exit velocity (V h ) as follows:…”

Image processing as a tool for high-pressure water jet coating removal assessment

“…Because the water energy is distributed over a high number of nozzles, each nozzle owns a rather low amount of kinetic energy. The thin jets may also be unstable in terms of aerodynamic effects [15,22]. The configurations with small nozzles travelling at one orbit only (numbers 9, 10) exhibit by far the lowest exposure efficiency.…”

“…These rotating nozzle carriers are much more efficient than traversing nozzles [1]. Singh et al [15] and Blades [16] were probably the first who investigated the performance of rotating multiple-nozzle heads. Although the rotational speeds (300 min −1 ) of the rotating carrier were rather low, the authors recognized the importance of a welldesigned overlap of individual jet paths in order to maximize material removal.…”

“…Although the rotational speeds (300 min −1 ) of the rotating carrier were rather low, the authors recognized the importance of a welldesigned overlap of individual jet paths in order to maximize material removal. Singh et al [15] suggested aerodynamic shear effects on quickly rotating water jets, promoting the separation of small liquid drops. The kinematics of quickly rotating multiple-nozzle carriers was in more detail investigated in [17][18][19] due to numerical simulations.…”