Particle water-jet technology is an efficient method that increases the erosion rate of cement material. The full potential of the jet energy, the ability to cover the full cement surface, and avoidance of erosion of the side casing are vital issues that need to be solved. In this study, a full-scale testing apparatus was developed to perform ground tests of the cement erosion process with recycling particle water-jet impact. This device allows for the cement erosion rate to be reliably adjusted and measured. A two-way coupled Eulerian-Lagrangian Computational Fluid Dynamics (CFD) modelling approach was utilized to investigate the impact flow field and erosion characteristics of the particle liquid-solid jet. The operating parameters (particle concentration, particle velocity, particle diameter, and standoff distance) were determined to obtain the optimal erosion rate. Overall, the simulation results are in good agreement with the experimental results. Results demonstrate that the potential core in the free jet zone can maintain a high impact velocity of the particles, while the maximum pressure is distributed in the impact zone. After impact with the cement surface at a very high velocity, the rebound particle velocity considerably decreases. The measured average erosion rate increases when the particle concentration reaches a critical value of 8%, at which the average erosion rate increases to its maximum value. Both the maximum unit erosion rate and average erosion rate increase as the particle diameter increases. To improved erosion of the cement, the optimal standoff distance is 3 cm (about 5 times the nozzle diameter). Also, industrial tests were successfully performed to increase the erosion rate by 50.7% for cement compared to traditional erosion methods.

颗粒水喷射技术是提高水泥材料侵蚀速率的有效方法。喷射能量的全部潜力，覆盖整个水泥表面的能力以及避免侧套管的侵蚀是需要解决的重要问题。在这项研究中，开发了一种全面的测试设备，以对水泥侵蚀过程进行地面测试，并利用循环的水射流冲击力进行测试。该设备可以可靠地调整和测量水泥侵蚀率。利用双向耦合欧拉-拉格朗日计算流体动力学（CFD）建模方法研究了颗粒液固射流的冲击流场和冲蚀特性。操作参数（颗粒浓度，颗粒速度，粒径，确定距离和对峙距离以获得最佳腐蚀速率。总体而言，仿真结果与实验结果吻合良好。结果表明，自由射流区中的潜在核可保持较高的粒子撞击速度，而最大压力分布在撞击区中。在以非常高的速度撞击水泥表面之后，回弹颗粒的速度大大降低。当颗粒浓度达到8％的临界值时，测得的平均腐蚀速率会增加，此时平均腐蚀速率会增加到最大值。最大单位腐蚀速率和平均腐蚀速率都随粒径的增加而增加。为了改善水泥的侵蚀，最佳支座距离为3 cm（约为喷嘴直径的5倍）。也，