有限元仿真模拟在超声喷水无损检测用水套设计中的应用  

Application of FEM Simulation in the Design of Water Jackets for Ultrasonic Water Spray Non-destructive Testing

作　　者：罗明[1] 马兆庆[1] 吴君豪[1] 蔡鹏 吴时红[1] LUO Ming;MA Zhaoqing;WU Junhao;CAI Peng;WU Shihong(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2024年第3期83-87,共5页Aerospace Materials & Technology

摘　　要：水套在超声喷水穿透检测中具有重要作用,为设计出具有良好耦合效果的水套,减少水流紊流对声波耦合的影响,本文通过构建探头套几何模型、物理建模、数值求解的有限元仿真方法对探头水套进行流体动力学仿真。结果表明,在无整流装置下,从入水口射入的水流撞击探头套内壁,产生严重紊流,进入出水管后,紊流状态仍然保持,水流流线方向杂乱。增加整流装置后,探头套内紊流得到很好的抑制,使得进入出水管的水流流线方向趋向一致,这种现象随着整流片增多而效果越加明显。本文为后续模拟水流经过出水口后的水柱状态,特别是随着初始水流速度加大后的水柱状态,以及利用有限元多物理场模拟功能,在加入声场后,模拟紊流状况下声场的变化打下了基础。Water jacket plays an important role in ultrasonic water spray penetration detection.In order to design a water jacket with good coupling effect and to reduce the influence of water flow turbulence on acoustic coupling,this paper constructs a finite element simulation of geometric model,physical model,and numerical solution for the probe jacket to conduct fluid dynamics simulation.The simulation results show that without a rectification device,the water injected from the inlet collides with the inner wall of the probe sleeve,causing severe turbulence.After entering the outlet pipe,the turbulent state is still maintained,and the direction of the water flow line is chaotic.After adding a rectification device,the turbulence inside the probe sleeve is well suppressed,making the direction of the water flow into the outlet pipe conforming to consistency.This phenomenon becomes more pronounced as the number rectifying element increase.This article aims to simulate the state of the water column after the water flow passes through the outlet,especially after increase of initial water flow velocity.The use of FEM’s muti_physical field simulation function with addition of sound fields has laid the foundation for simulating changes in sound fields under turbulent conditions.

关 键 词：有限元仿真 超声喷水穿透 探头水套 紊流 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]