Effect of low-speed waterjet pressure on the rock-breaking performance of unsubmerged cavitating abrasive waterjet

• DOI: 10.1016/j.petsci.2024.03.012
• Publication Date: 2024-03-20T23:34:35Z
• Authors: Chen-Xing Fan; Deng Li; Yong Kang; Hai-Tao Zhang

Unsubmerged cavitating abrasive waterjet (UCAWJ) has been shown to artificially create a submerged environment that produces shear cavitation, which effectively enhances rock-breaking performance. The cavitation generation and collapse intensity depend on the pressure difference between intermediate high-speed coaxial low-speed waterjet. However, effect of is pending. For this purpose, performance at different standoff distances was experimentally investigated, effects erosion time ruby nozzle diameter were discussed. Finally, micromorphology sandstone observed locations. results show increased can significantly improve At distances, mass loss increases first then decreases with increase pressure, maximum 10.4 g 0.09 MPa. surface morphology measured using 3D profiler, in both depth roughness indicated significant collapse. 0.18 MPa, reach 600 μm 127 μm.