电厂碳钢三通管件流动加速腐蚀的数值模拟分析  

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

作　　者：程俊杰 马丽媛 韩传军 马建平 王宏铭 司晓东 董云山 CHENG Junjie;MA Liyuan;HAN Chuanjun;MA Jianping;WANG Hongming;SI Xiaodong;DONG Yunshan(Ningxia Jingneng Ningdong Power Generation Co.,Ltd.,Yinchuan 751400,China;School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[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

出　　处：《材料保护》2024年第7期235-241,共7页Materials Protection

基　　金：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)。

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。As common components in power plant piping,ensuring the safe operation of tee tube is of great significance for the actual produc-tion 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 oc-curred 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 oper-ation of power plant piping systems.

关 键 词：碳钢 三通管件 流动加速腐蚀 数值模拟 

分 类 号：TG172[金属学及工艺—金属表面处理]