喷嘴
磨料
人体净化
文丘里效应
材料科学
喷射(流体)
计算流体力学
复合材料
机械工程
机械
废物管理
工程类
入口
物理
作者
Le Zhong,Jieheng Lei,Zhe-wen Zuo,Jiqiang Tu,Jian Deng,Lei Ze-yong,M. G. Zhao,Yi-Jun Hua
标识
DOI:10.1080/02726351.2022.2158147
摘要
To study the effect of three different types of nozzles (straight conical, Venturi, and streamline) on the decontamination effect of radioactively contaminated metals abrasive jet, the gas-solid two-phase flow in the abrasive jetting process is numerically simulated by the method of CFD-DEM coupling simulation. The coverage and distribution uniformity of abrasive particles, the impact velocity, and the wear of the nozzle itself are focused on, and the rationality and reliability of the simulation experiment method and the evaluation method of the experimental results are proved by the verification experiments. The results show that the Venturi nozzle is more suitable for the decontamination of radioactively contaminated metals because it has the advantages of uniform abrasive distribution, high abrasive impact velocity, and good nozzle wear. The nozzle is mainly subjected to low-angle micro-cutting erosion wear, so when selecting nozzle materials, more emphasis should be placed on high-hardness materials to resist micro-cutting wear. The impact distance has a very obvious impact on the decontamination effect of the abrasive. In the decontamination process, the impact distance should be set reasonably, and the uniformity of the abrasive particle distribution should be fully considered to ensure the decontamination effect.
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