Numerical Simulation Study on Steam-Particle Two-phase Flow Characteristics of the Final Stage Superheater Tube Screen in Supercritical Power Plant Boiler

YAN Aijun; QIAO Yue; CHEN Zhi; ZHU Lei; ZHOU Chenlong; FAN Zhidong; CAI Liuxi

doi:10.19805/j.cnki.jcspe.2025.240328

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Numerical Simulation Study on Steam-Particle Two-phase Flow Characteristics of the Final Stage Superheater Tube Screen in Supercritical Power Plant Boiler

更新时间：2026-10-10

- Numerical Simulation Study on Steam-Particle Two-phase Flow Characteristics of the Final Stage Superheater Tube Screen in Supercritical Power Plant Boiler
- Chinese Journal of Power Engineering Vol. 45, Issue 8, Pages: 1153-1161(2025)
- 作者机构：
  
  1. 西安热工研究院有限公司,陕西,西安,710054
  2. 华能安源发电有限责任公司,江西,萍乡,337200
  3. 华能渑池热电有限责任公司, 河南渑池,472400
  4. 西安交通大学化工机械研究所,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240328
  CLC：
- Online First：12 August 2025，
  
  Published：2025
- 稿件说明：
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闫爱军,乔越,陈志,朱磊,周陈龙,范志东,蔡柳溪. 超临界电站锅炉末级过热器管屏汽固两相流动特性数值模拟研究动力工程学报, 2025, 45(8): 1153-1161 https://doi.

org/10.19805/j.cnki.jcspe.2025.240328
闫爱军,乔越,陈志,朱磊,周陈龙,范志东,蔡柳溪. 超临界电站锅炉末级过热器管屏汽固两相流动特性数值模拟研究动力工程学报, 2025, 45(8): 1153-1161 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240328.

org/10.19805/j.cnki.jcspe.2025.240328 DOI：

摘要

针对锅炉过热器管束在服役过程中出现的爆管问题

基于超算平台对某电站锅炉末级过热器管屏进行了全三维建模和结构化网格离散

利用雷诺时均方法和拉格朗日双相耦合模型对过热器管屏内的蒸汽流动特性和氧化皮颗粒堆积行为进行了系统的数值模拟

探讨了负荷变化及氧化皮颗粒脱落对过热器管屏蒸汽流量分配的影响。结果表明:在未考虑烟气侧热偏差前提下

设置节流孔的管束蒸汽流量要比其他正常管束流量小5.63%~11.23%。同屏过热器内缠绕管(管束17)的流量偏差最大

达到6.3%。4个负荷工况下

同屏不同管束出口蒸汽流速差异在10.3% ~11.7%

会导致不同管束输运氧化皮颗粒的动力产生较大差异。在不同管束氧化皮脱落工况下

当颗粒尺寸从500 μm增大至2 000 μm时

颗粒堆积概率增大15%~20%。4管同时脱落氧化皮工况下同屏各管流量最大正、负偏差均超过6.6%

需要在过热器设计过程中予以考虑。

Abstract

Regarding tube burst issue of boiler superheater tube bundle during service

a full three-dimensional modeling and structured mesh discretization of the final stage superheater tube screen of a power plant boiler were carried out based on supercomputing platform. The Reynolds average Navier-Stokes simulation method and Lagrangian two-phase coupling model were used to systematically simulate the steam flow characteristics and oxide scale particle accumulation behavior inside the superheater tube screen. Effect of load change and oxide scale particle exfoliation on the steam flow distribution of the superheater tube screen was explored. Results show that the steam flow rate of the tube bundle with throttle holes is 5.63%-11.23% lower than that of other normal tube bundles without considering the thermal deviation on the flue gas side. The maximum flow rate deviation of the same tube screen reaches 6.3%

and locates in coiled tube bundle (tube bundle 17). The difference in steam flow velocity at the outlet of different tube bundles of the same tube screen under four load conditions ranges from 10.3% to 11.7%

which can lead to significant difference in the power of transporting oxide scale particles in different tube bundles. When the particle size increases from 500 μm to 2 000 μm under different conditions of oxide scale exfoliation in tube bundles

the probability of particle accumulation increases by 15% to 20%. Both of the maximum positive and negative deviation of flow rate for each tube bundle on the same tube screen exceed 6.6% under the condition of simultaneous exfoliation of oxide scale in the four tube bundles

which should be considered in the superheater design process.

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references

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