淹没水射流清洗地浸采铀生产井的数值模拟与分析

Numerical simulation and analysis of in-situ leaching uranium production well cleaned by submerged water jet

为解决淹没环境下水射流清洗地浸采铀生产井的过程难以直接观测,导致水射流压力、角度、靶距等参数设定缺乏依据的问题,通过Fluent数值模拟软件对比空气和水中水射流状态,探讨水深、出口压力、靶距以及冲击角对淹没射流的影响。研究结果表明:淹没环境对水射流效果影响很大;水深和出口压力对射流影响有限;靶距保持在13 mm以内,淹没水射流可以达到和空气中相近的流速;打击压力和切应力随着冲击角的增大而增大,但是其有效作用范围越来越小,较为合适的冲击角是60°,这可为水下清洗提供技术支持。

In order to solve the problem that the setting parameters such as water jet pressure,angle and target distance were lack of basis due to the difficulty in directly observing the process of water jet cleaning in-situ leaching uranium production wells in submerged environment.Fluent numerical simulation software was used to compare the status of air jet and water jet,and the influence of water depth,outlet pressure,target distance and impact angle on submerged jet was discussed.The results show that the flood environment has a great effect on the effect of water ejaculation,but water depth and outlet pressure have limited effect on the ejaculation,if the target distance is kept within 13 mm,the flooded water ejaculation can reach a flow rate level similar to that in the air,and the strike force and cut stress increase with the increase of the impact angle,but its effective range is smaller and smaller,and the more suitable impact angle is 60°,which provides technical support for the underwater cleaning.