Assessment of the effectiveness of high-pressure water jet machining generated using self-excited pulsating heads

作者：Monika Szada-Borzyszkowska, Wojciech Kacalak, Kamil Banaszek, Frank Pude, Andrzej Perec, Konrad Wegener, Grzegorz Królczyk · 发表于：The International Journal of Advanced Manufacturing Technology · 年份：2024 · DOI：10.1007/s00170-024-14040-6 · 被引用次数：16 · 研究领域：Erosion and Abrasive Machining、Particle Dynamics in Fluid Flows、Tunneling and Rock Mechanics

Abstract The article presents the research findings on the process of machining with a pulsating water jet. The study determined the influence of water velocity and pressure, providing insights into the dynamics of pulsating water jets. An evaluation of the generation process of pulsating water jets was conducted for various models of self-excited pulsating heads. The aim was to determine the impact of geometric parameters of the self-excited pulsating head and hydrodynamic working conditions on the performance of such a head, the dynamic characteristics of the water jet it produces, and its technological suitability for material erosion. In the first stage, simulation studies were carried out for three models of self-excited pulsating heads. Based on these studies, a solution with appropriate geometry was selected. Subsequently, experimental studies were conducted using the self-excited head and dedicated research setups. For the selected solution of the self-excited pulsating head, pulse durations, jet thrust forces, and frequency variations for different working pressure values were determined. The analysis showed a correlation between the geometric parameters of the head, pressure changes, and the characteristics of the generated pulses in the pulsed water jets. Pulse generation was made possible by increasing the water flow through side openings. Pulses with greater water volume exhibited increased erosive potential, particularly noticeable at higher pressures. It was fo...