基于FLUENT的淹没环境高压水射流数值模拟

Numerical Simulation of Submerged High Pressure Water Jetting Based on FLUENT

海底管道配重混凝土的去除工作是大多数水下管道维抢修的前提,高压水射流应用于海底管道配重混凝土的去除工作相比于机械方法优势明显。将高压水射流应用于海底需要探究淹没环境对射流效果的影响,通过FLUENT数值分析,分别研究了喷嘴直径、环境压力、射流压力对淹没射流动压的影响,得到了一些对工程有重要指导意义的结论,结论指出:淹没环境对高压水射流的效果削弱很大;环境压力对射流影响相对较小;喷嘴直径和射流压力对射流效果影响明显。最后通过淹没环境高压水射流破碎混凝土实验应用和验证了仿真所得结论。

Submarine pipeline concrete removal is the premise of most pipeline maintenance and emergency repair technology. Using high pressure water jetting on concrete removal has lots of benefits than using normal mechanical removal method. It has a wide engineering application It is very important to explore the effect ofwaterjettingprocess in submerged environment, when using high pressure water jetting in water. By FLUENT numerical analysis, this paper respectively studies the influence of the nozzle diameter, environment pressure and jet pressure on the submerged jet＇s dynamic pressure, and gets some important guiding conclusions, which show that submerged environment weaken the effect largely of high pressure water jet process, the environment pressure has little effect on jet process, nozzle diameter and the jet pressure has significant effect on jet process. At last, experiment of removing concrete with submerged high pressure water jetting is took to apply and test the simulation conclusions.