电厂碳钢三通管件流动加速腐蚀的数值模拟分析

程俊杰, 马丽媛, 韩传军, 马建平, 王宏铭, 司晓东, 董云山

doi:10.16577/j.issn.1001-1560.2024.0170

材料保护 >

2024 , Vol. 57 >Issue 7: 235 - 241

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0170

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电厂碳钢三通管件流动加速腐蚀的数值模拟分析

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(1. 宁夏京能宁东发电有限责任公司, 宁夏银川 751400;2. 江苏科技大学能源与动力学院, 江苏镇江 212100)

司晓东(1990－),博士,讲师,研究方向为管道安全防护技术,E-mail: xiaod_si＠163.com

收稿日期: 2023-11-22

修回日期: 2024-01-16

录用日期: 2024-01-25

网络出版日期: 2024-08-19

基金资助

江苏省双创博士项目(JSSCBS20210994)；江苏省高等学校基础科学(自然科学)研究面上项目(23KJB430015)；中国博士后科学基金(2023M732564)

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Numerical Simulation Analysis of Flow-Accelerated Corrosion in Carbon Steel Tee Tube in Power Plants

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(1.Ningxia Jingneng Ningdong Power Generation Co., Ltd., Yinchuan 751400, China；2.School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, China)

SI Xiaodong (1990－), Ph.D., Lecturer, Research Focus: Pipeline Safety Protection Technology, E-mail:xiaod_si＠163.com

Received date: 2023-11-22

Revised date: 2024-01-16

Accepted date: 2024-01-25

Online published: 2024-08-19

Supported by

Innovation and Entrepreneurship Program of Jiangsu Province (JSSCBS20210994)；The Natural Science Foundation of the Jiangsu Higher Education Institutions of China (23KJB430015)；China Postdoctoral Science Foundation(2023M732564)

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摘要

三通管件作为电厂管道常用构件，保证其安全运行对电厂实际生产意义重大。通过采用计算流体力学模拟和Sanchez-Caldera 模型，在考虑电厂实际运行工况的基础上，研究了不同入口流速下T 型三通分流管件和T型三通合流管件对流动加速腐蚀速率的影响。结果表明，在相同入口流速下，T 型三通分流管件的流动加速腐蚀更为严重。 T 型三通分流管件的最大流动加速腐蚀速率出现在支管辅出水口的0.5D 位置，而T 型三通合流管件的最大值则位于主管道岔道口下游1D 侧壁处。此外，研究还发现入口流速对流动加速腐蚀敏感位置没有影响。研究结果对电厂管道的设计和运行具有重要指导意义。

关键词： 碳钢; 三通管件; 流动加速腐蚀; 数值模拟

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程俊杰, 马丽媛, 韩传军, 马建平, 王宏铭, 司晓东, 董云山 . 电厂碳钢三通管件流动加速腐蚀的数值模拟分析[J]. 材料保护, 2024 , 57(7) : 235 -241 . DOI: 10.16577/j.issn.1001-1560.2024.0170

Abstract

As common components in power plant piping, ensuring the safe operation of tee tube is of great significance for the actual production of power plants.In this study, computational fluid dynamics simulations and the Sanchez-Caldera model were employed to investigate the effects of different inlet flow velocities on the flow-accelerated corrosion rates of T-type tee diversion tubes and T-type tee confluence tubes,considering the actual operating conditions of power plants.The results indicated that, under the same inlet flow velocity, the flow-accelerated corrosion was more severe in T-type tee diversion tubes.The maximum flow-accelerated corrosion rates rate in T-type tee diversion tubes occurred at the 0.5D position from the branch outlet,while in T-type tee confluence tubes,the maximum flow-accelerated corrosion rates rate was located at the sidewall downstream of the main pipe intersection at the 1D position.Additionally,it was found that the inlet flow velocity did not affect the sensitive locations of flow-accelerated corrosion rates.The findings of this study provided significant guidance for the design and operation of power plant piping systems.

Key words： carbon steel; tee tube; flow-accelerated corrosion; numerical simulation

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