Kinetic Study on Mass Transfer Process with Flow-accelerated Corrosion Downstream of Orifice Plates in Supercritical Units

XIAO Zhuonan; SONG Qimin; GUO Wei; YANG Jie; ZHAO Le

doi:10.19805/j.cnki.jcspe.2025.240005

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Kinetic Study on Mass Transfer Process with Flow-accelerated Corrosion Downstream of Orifice Plates in Supercritical Units

更新时间：2025-11-28

- Kinetic Study on Mass Transfer Process with Flow-accelerated Corrosion Downstream of Orifice Plates in Supercritical Units
- Chinese Journal of Power Engineering Vol. 45, Issue 3, Pages: 347-353(2025)
- 作者机构：
  
  内蒙古科技大学能源与环境学院,内蒙古,包头,014010
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240005
  CLC： O35;TK124;TM621
- Published Online：15 March 2025，
  
  Published：2025
- 稿件说明：
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肖卓楠,宋其珉,郭玮,杨杰,赵乐. 超临界机组孔板下游FAC传质过程动力学分析动力工程学报, 2025, 45(3): 347-353 https://doi.

org/10.19805/j.cnki.jcspe.2025.240005
肖卓楠,宋其珉,郭玮,杨杰,赵乐. 超临界机组孔板下游FAC传质过程动力学分析动力工程学报, 2025, 45(3): 347-353 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240005.

org/10.19805/j.cnki.jcspe.2025.240005 DOI：

摘要

为了更好地预测电厂管道流动加速腐蚀(FAC)

基于电厂管道实际工况

使用COMSOL软件根据气含率变化调整水的物性参数

模拟孔板管道下的流场

观察浓度及高湍动能分布区域

通过模拟计算得到不同流相下速度、壁面剪切力及传质系数的变化

并结合单相流、两相流流动中加速腐蚀预测模型

分析了不同气含率对流动加速腐蚀的影响。结果表明:水蒸气的存在导致孔板下游上、中、下部壁面上两相流的FAC速率较单相流的FAC速率均有不同程度增大

且上部壁面的流动加速腐蚀速率增幅最明显;当温度为150 ℃

介质为两相流且气含率为0.5%时

壁面处的FAC速率最大

为单相流情况下的1.001 112倍。

Abstract

To better predict the flow-accelerated corrosion (FAC) in power plant pipelines

the physical parameters of the steam-water mixture were calculated based on the gas holdup according to the actual operating conditions of the power plant pipeline. Using COMSOL software

the flow field downstream of the orifice plate in the pipeline was simulated

and the concentration of iron ions and the distribution of turbulent kinetic energy were analyzed. The variation patterns of velocity

wall shear force

and mass transfer coefficient under different flow phases were obtained. Combined with single-phase flow and two-phase flow accelerated corrosion prediction models

the impact of gas holdup on flow-accelerated corrosion was analyzed. Results show that the presence of water vapor leads to an increase in the FAC rate of two-phase flow on the upper

middle

and lower walls of the pipeline downstream of the orifice plate

compared to the FAC rate of single-phase flow

with the most significant increase occurring on the upper wall. When the temperature is 150 ℃

the medium is two-phase mixture

and the gas holdup is 0.5%

the FAC rate at the wall is the highest

being 1.001 112 times that of the single-phase flow case.

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references

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