PIV investigation of high Reynolds number submerged water jets at high-pressure ambient conditions

Abstract High-pressure water jets bear a great technological potential to enhance geothermal deep drilling. Compared existing cutting technologies, significantly different operation conditions are encountered under deep-drilling conditions, such as high ambient pressures. The fundamental fluid mechanics affected by those conditions. In this work we examine the influence of increasing pressure up 12.0 MPa on jet characteristics submerged drilling PIV measurements flow field at changing cavitation numbers reveal two characteristic regimes, which distinguished critical number. cavitating regime, decays considerably faster with distance nozzle than in non-cavitating regime. addition that, an intensity shortens core length and increases spreading angle has similar effect turbulence single-phase flows. Related decreasing kinetic energy resulting impact force specimen surface decreases intensity. Our investigations indicate that technology transfer from requires adjustments both geometries Graphic abstract