Abstract
AbstractAn in‐depth process analysis of water jetting, a promising cost‐effective drilling method for the exploration of geothermal reservoirs, is presented. The jetting process is analyzed under submerged and pressurized conditions by complementary high‐speed shadow imaging, particle image velocimetry, and rock erosion analysis. The shadowgraphy and velocimetry experiments show that nozzle cavitation dominates the process, and it can be described by a modified cavitation number. Rock erosion experiments show that cloud cavitation governs material erosion. Thus, control of cavitation is essential for the jetting process.
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