用于探测液态金属-气体的DLC涂层式丝网探针数值模拟与结构优化
TL334; 液态金属-气体两相流是铅冷快堆在蒸汽发生器传热管破裂(SGTR)事故下的物理现象之一,考虑到液态金属的不透明性、腐蚀性及高温性,本文提出一种类金刚石(DLC)涂层式丝网探针(WMS)对液态金属-气体两相流相态分布进行探测.基于COMSOL软件,建立了涂层式WMS的数值模型并进行了实验验证,通过电场模拟阐明了该新型探针应用于含液态金属气液两相流的可行性.进一步地,通过改变丝网电极的间距与直径、涂层的厚度,研究了结构参数对涂层式WMS测量精度的影响.结果表明,电极丝横向间距为2～3 mm、垂直间距为1.5～2 mm时,WMS测量精度较高,而涂层厚度和电极丝直径的影响较小.本研究可指导...
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| Published in | 原子能科学技术 Vol. 58; no. 2; pp. 344 - 356 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
上海交通大学核科学与工程学院,上海 200240
01.02.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-6931 |
| DOI | 10.7538/yzk.2023.youxian.0291 |
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| Abstract | TL334; 液态金属-气体两相流是铅冷快堆在蒸汽发生器传热管破裂(SGTR)事故下的物理现象之一,考虑到液态金属的不透明性、腐蚀性及高温性,本文提出一种类金刚石(DLC)涂层式丝网探针(WMS)对液态金属-气体两相流相态分布进行探测.基于COMSOL软件,建立了涂层式WMS的数值模型并进行了实验验证,通过电场模拟阐明了该新型探针应用于含液态金属气液两相流的可行性.进一步地,通过改变丝网电极的间距与直径、涂层的厚度,研究了结构参数对涂层式WMS测量精度的影响.结果表明,电极丝横向间距为2～3 mm、垂直间距为1.5～2 mm时,WMS测量精度较高,而涂层厚度和电极丝直径的影响较小.本研究可指导DLC涂层式WMS在液态金属-气体两相环境中的实际应用,并为分析SGTR事故后的多相分布提供技术基础. |
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| AbstractList | TL334; 液态金属-气体两相流是铅冷快堆在蒸汽发生器传热管破裂(SGTR)事故下的物理现象之一,考虑到液态金属的不透明性、腐蚀性及高温性,本文提出一种类金刚石(DLC)涂层式丝网探针(WMS)对液态金属-气体两相流相态分布进行探测.基于COMSOL软件,建立了涂层式WMS的数值模型并进行了实验验证,通过电场模拟阐明了该新型探针应用于含液态金属气液两相流的可行性.进一步地,通过改变丝网电极的间距与直径、涂层的厚度,研究了结构参数对涂层式WMS测量精度的影响.结果表明,电极丝横向间距为2～3 mm、垂直间距为1.5～2 mm时,WMS测量精度较高,而涂层厚度和电极丝直径的影响较小.本研究可指导DLC涂层式WMS在液态金属-气体两相环境中的实际应用,并为分析SGTR事故后的多相分布提供技术基础. |
| Abstract_FL | The steam generator tube rupture(SGTR)accident is one of the design basis accidents of lead-cooled fast reactor(LFR).In the event of such an accident,a sub-cooled water jet is generated in the lead pool of primary circuit,which forms a compli-cated distribution of the liquid metal-gas two-phase flow.The detection of the two-phase interface and migration of steam bubbles is an significant part of reactor safety analysis.Due to the opacity,corrosiveness,high temperature of liquid metal,and the current limitations of measurement methods involving liquid metal-gas two-phase flow,a diamond-like carbon(DLC)coated wire-mesh sensor(WMS)based on electrical principles was proposed in this paper.The sensor could achieve the image of the liquid metal-gas two-phase distribution inside the flow channel,while preventing the corrosion failure of the sensor.Based on the COMSOL software,a numerical model of the DLC coated WMS was established.Selecting the materials of two phases as liquid GaInSn alloy and air,the simulation of the electric field in the liquid metal environment contai-ning a single bubble was performed,and an electric signal value matrix representing the liquid metal-gas two-phase was output.The signal matrix was further normalized through the linear relation to obtain the two-phase distribution image,which verified the application feasibility of the coated WMS in liquid metal.In addition,a prototype of the DLC coated WMS was manufactured,and the numerical simulation results were experi-mentally validated in order to demonstrate the rationality of the numerical model.Furthermore,the influence of different structural parameters on the measurement accuracy of coated WMS was studied in detail by changing the transverse interval,axial interval,electrode diameter,coat thickness,and the size of air bubble.The simulation results show that the electric field distribution in the liquid metal-gas two-phase environ-ment differs significantly from that in conventional fluid medias such as water-gas due to the high relative permittivity of liquid metal.On the other hand,considering the resolu-tion of the WMS and the phenomenon of electric signal crosstalk,the transverse interval of electrode should be selected between 2-3 mm,and the axial interval should be selected between 1.5-2 mm to achieve high measurement accuracy.The coat thickness and electrode diameter have little influence on the measurement accuracy,but to reduce the intrusion effect of the WMS,the electrode diameter should be selected between 0.4-0.5 mm and the coat thickness should not exceed half of the electrode radius.This study could guide the practical application of DLC coated WMS in the liquid metal-gas two-phase environment and provide a technical basis for the analysis of multi-phase distribution under SGTR accidents. |
| Author | 顾汉洋 刘莉 刘茂龙 袁俊杰 包睿祺 刘帅 |
| AuthorAffiliation | 上海交通大学核科学与工程学院,上海 200240 |
| AuthorAffiliation_xml | – name: 上海交通大学核科学与工程学院,上海 200240 |
| Author_FL | YUAN Junjie LIU Li BAO Ruiqi LIU Shuai LIU Maolong GU Hanyang |
| Author_FL_xml | – sequence: 1 fullname: BAO Ruiqi – sequence: 2 fullname: LIU Li – sequence: 3 fullname: LIU Shuai – sequence: 4 fullname: YUAN Junjie – sequence: 5 fullname: LIU Maolong – sequence: 6 fullname: GU Hanyang |
| Author_xml | – sequence: 1 fullname: 包睿祺 – sequence: 2 fullname: 刘莉 – sequence: 3 fullname: 刘帅 – sequence: 4 fullname: 袁俊杰 – sequence: 5 fullname: 刘茂龙 – sequence: 6 fullname: 顾汉洋 |
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| DocumentTitle_FL | Numerical Simulation and Structure Optimization of DLC Coated Wire-mesh Sensor for Liquid Metal-gas Measurement |
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| Keywords | wire-mesh sensor liquid metal-gas two-phase flow void frac-tion 丝网探针 空泡份额 液态金属-气体两相流 类金刚石涂层 DLC coat 数值模拟 numerical simulation |
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| Title | 用于探测液态金属-气体的DLC涂层式丝网探针数值模拟与结构优化 |
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