Numerical Analysis of Flow Instability and Dynamic Characteristics in Water Wall of 350 MW Ultra-Flexible Boiler during Deep Peak-Shaving Operation

WEI Ziyu; ZHU Tianru; YU Tingting; YIN Yaning; WANG Ting; YANG Dong

doi:null

您当前的位置：

首页 >

文章列表页 >

Numerical Analysis of Flow Instability and Dynamic Characteristics in Water Wall of 350 MW Ultra-Flexible Boiler during Deep Peak-Shaving Operation

更新时间：2025-08-21

- Numerical Analysis of Flow Instability and Dynamic Characteristics in Water Wall of 350 MW Ultra-Flexible Boiler during Deep Peak-Shaving Operation
- JOURNAL OF XI’AN JIAOTONG UNIVERSITY (2025)
- 作者机构：
  
  1.西安交通大学动力工程多相流国家重点实验室,陕西省西安市710049
  2.哈尔滨锅炉厂有限责任公司低碳热力发电技术与装备全国重点实验室,黑龙江省哈尔滨市150046
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.3
- Received：17 June 2025，
  
  Revised：2025-08-02，
  
  Accepted：21 August 2025，
- 稿件说明：
移动端阅览
WEI Ziyu, ZHU Tianru, YU Tingting, et al. Numerical Analysis of Flow Instability and Dynamic Characteristics in Water Wall of 350 MW Ultra-Flexible Boiler during Deep Peak-Shaving Operation[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY, 2025.
DOI：

WEI Ziyu, ZHU Tianru, YU Tingting, et al. Numerical Analysis of Flow Instability and Dynamic Characteristics in Water Wall of 350 MW Ultra-Flexible Boiler during Deep Peak-Shaving Operation[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY, 2025. DOI：

摘要

针对工质参数快速变化在超灵活锅炉深度调峰过程中引起的典型流体动力不稳定现象，提出了一种深入探究超灵活锅炉的密度波不稳定性机理及水冷壁动态响应特性的预测模型。基于频域法，将整个蒸发管段划分为过冷区、两相区和过热区3部分，对守恒方程进行线性化和微小扰动处理，利用拉普拉斯变换求解获得管道段的传递函数，基于此开发C语言和MATLAB的一维线性三区段临界热负荷（CHF）预测程序，并采用奈奎斯特稳定性判据评估系统的稳定性。以350 MW超灵活塔式超临界煤粉锅炉为研究对象，结果表明：75%和30%额定负荷的CHF分别为194.9 kW·m

-2

和26.38 kW·m

-2

，实际工况点距离热负荷边界有足够的安全裕度；当锅炉在两负荷之间运行时，提高运行压力和热负荷可增强流动稳定性，增加管段长度和降低管道倾角会降低流动稳定性；入口焓越大，系统恢复稳定所需的时间越短。研究成果可为锅炉深度调峰安全运行奠定理论基础。

Abstract

To address the typical hydrodynamic instability phenomena induced by periodic fluctuations in working fluid pressure

flow rate

and temperature during deep peak-shaving operation of ultra-flexible boilers

a predictive model is proposed to investigate the density wave oscillation mechanisms and dynamic response characteristics of water-cooled walls in-depth. Using the frequency-domain method

the evaporator tube section is divided into subcooled

two-phase

and superheated regions. The conservation equations are linearized with small perturbations

and Laplace transform is applied to obtain the pipe section's transfer function. Based on this

a one-dimensional linear three-region Critical Heat Flux (CHF) prediction program was developed in C and Matlab

with system stability evaluated using the Nyquist stability criterion. For a 350 MW ultra-flexible tower-type supercritical coal-fired boiler

analysis shows CHF values of 194.9 kW·m⁻² at 75% rated load and 26.38 kW·m⁻² at 30% rated load

with actual operating conditions maintaining sufficient safety margins from thermal load boundaries. When operating between these loads

increasing operating pressure and thermal load enhances flow stability

while longer tube lengths and reduced pipe inclination angles decrease stability. Higher inlet enthalpy shortens system stabilization time. These findings provide theoretical support for safe boiler operation during deep peak-shaving.

关键词

Keywords

references

HASSAN Q , ALGBURI S , SAMEEN A Z , et al . A comprehensive review of international renewable energy growth [J ] . Energy and Built Environment , 2024 .

QU Mofeng , YANG Dong , LIANG Ziyu ， et al . Experimental and numerical investigation on heat transfer of ultra: supercritical water in vertical upward tube under uniform and non-uniform heating [J ] . International Journal of Heat and Mass Transfer , 2018 , 127 : 769 - 783

WIDJAJANTO T , DARMADI D B , IRAWAN Y S , et al . Failures analysis of tube coating in Circulating Fluidized Bed (CFB) boiler [J ] . Heliyon , 2024 , 10 ( 4 ): e26134 .

XI K , LI R , ZHAO L , et al . Experimental investigations of flow dynamics in the riser of supercritical water circulating fluidized bed [J ] . Internation al Journal of Multiphase Flow , 2023 , 169 : 104600 .

欧阳诗洁 , 李娟 , 董乐 , 周熙宏 , 杨冬 . 超超临界锅炉低负荷运行时的流动不稳定性计算分析 [J ] . 西安交通大学学报 , 2019 , 53 ( 07 ): 84 - 91 .

OUYANG Shijie , LI Juan , DONG Le , et al . Calculation and analysis on the flow instability of an ultra supercritical boiler under low load [J ] . Journal of Xi'an Jiaotong University , 2019 , 53 ( 07 ): 84 - 91 .

杨冬 , 聂超 , 周科 , 等 . 超临界机组深度调峰工质流动不稳定试验与理论计算 [J ] . 洁净煤技术 , 2023 , 29 ( 06 ): 40 - 48 .

YANG Dong , NIE Chao , ZHOU Ke , et al . Experiment and theoretical calculation of flow instability in deep peak：shaving of supercritical units [J ] . Clean Coal Technology , 2023 , 29 ( 06 ): 40 - 48 .

周旭 , 周妍君 , 李维成 , 等 . 660 MW超超临界CFB锅炉失电壁温计算及运行措施 [J ] . 洁净煤技术 , 2023 , 29 ( 11 ): 91 - 98 .

ZHOU Xu , ZHOU Yanjun , LI Wercheng , et al . Calculation of heating surface wall temperature and operation measures for 660 MW ultra supercritical CFB boiler under electricity failure [J ] . Clean Coal Technology , 2023 , 29 ( 11 ): 91 - 98 .

严俊杰 , 刘明 , 王朝阳等 . 燃煤发电机组瞬态过程高效灵活清洁协同的能势动态匹配技术及应用 [J/OL ] . 西安交通大学学报 : 1 - 8 [ 2024-02-27 ] .

YAN Junjie , LIU Ming , WANG Chaoyang , et al . Energy-potential dynamic matching technology for the synergy of high-efficiency, flexibility and clean for coal-fired power generation units during the transient processes and its application [J/OL ] . Journal of Xi’an Jiaotong Univerisity , : 1 - 8 [ 2024-02-19 ] .

吴浩民 , 王烈高 , 卫鹏凯 , 梁志远 , 赵钦新 . 电站锅炉深度调峰超温工况下水冷壁腐蚀机理研究 [J ] . 西安交通大学学报 , 2023 , 57 ( 11 ): 118 - 129 .

WU Haomin , WANG Liegao , WEI Pengkai , et al . Overheating corrosion behavior of heat resistant steels during deep peaking [J ] . Journal of Xi'an Jiaotong University , 2023 , 57 ( 11 ): 118 - 129 .

杜晓成，王奥宇，项昱轩，等 . 超临界CFB锅炉灵活运行方式下的流动传热及动态特性试验研究 [J ] . 热力发电 , 2023 , 52 ( 09 ): 76 - 86 .

DU Xiaocheng , WANG Aoyu , XIANG Yuxuan , et al . Experimental investigation on flow heat transfer and dynamic characteristics of supercritical CFB boiler under flexible operation [J ] . Thermal Power Generation , 2023 , 52 ( 09 ): 76 - 86 .

HU W , XUE S , GAO H , et al . Leakage failure analysis on water wall pipes of an ultra-supercritical boiler [J ] . Engineering Failure Analysis , 2023 , 154 : 107670 .

CARRASCO D S , GOODWIN G C , PEIRCE R D . Novel modelling for a steam boiler under fast load dynamics with implications to control [J ] . Automatica , 2023 , 156 : 111184 .

侯素霞，赵福宇，刘成．频域法分析两相流动不稳定性 [J ] . 2007 : 1 ．

Hou Suxia , Zhao Fuyu , Liu Cheng . Frequency domain method to analyze the instability of two-phase flow [J ] . 2007 : 1 ．

李军，李晓明，刘长亮．开式自然循环流动不稳定性的频域法分析 [J ] . 原子能科学技术 , 2017 , 51 ( 10 ) : 1800 - 1805 ．

LI Jun , LI Xiaoming , LIU Changliang . Instability analysis of open natural circulation system using frequency domain method [J ] . Atomic Energy Science and Technology , 2017 , 51 ( 10 ) : 1800 - 1805 ．

ZHANG Y , LI H , LI L , et al . Study on two-phase flow instabilities in internally ribbed tubes by using frequency domain method [J ] . Applied Thermal Engineering , 2014 , 65 ( 1-2 ): 1 - 13 .

田晓艳，田文喜，朱大欢，等．基于频域法超临界水冷堆CSR1000流动不稳定性研究 [J ] . 原子能科学技术， 2013 ， 47 ( 3 ) : 402 - 408 ．

Tian Xiaoyan , Tian Wenxi , ZHU Dahuan , et al . Flow instability analysis of supercritical water-cooled reactor CSR1000 based on frequency domain [J ] . Atomic Energy Science and Technology , 2013 , 47 ( 3 ): 402 - 408 .

薛爱军，程旭．超临界水热力系统的稳定性的简化模型分析 [J ] . 核动力工程 , 2009 , 30 ( 5 ) : 35 - 39 ．

XUE Aijun ， CHENG Xu ． Stability analysis of a simplified model of supercritical water-cooled system [J ] . Nuclear Power Engineering , 2009 , 30 ( 5 ) : 35 - 39 ．

LIANG Qian , LI Xiaowei , SU Yang , et al . Frequency domain analysis of two-phase flow instabilities in a helical tube once through steam generator for HTGR [J ] . Applied Thermal Engineering ， 2020 , 168 : 114839 .

李维腾 , 郭泽瑞 , 韩磊 , 等 . 超临界循环流化床锅炉深度调峰时水冷壁流动不稳定特性计算分析 [J ] . 西安交通大学学报 , 2025 , 59 ( 01 ): 68 - 77 .

LI Weiteng , GUO Zerui , HAN Lei , et al . Calculation and safety analysis of unstable flow characteristics of water wall during deep peak shaving in supercritical CFB boiler [J ] . Journal of Xi'an Jiaotong University , 2025 , 59 ( 1 ): 68 - 77 .

王芊．垂直上升管内汽液两相流不稳定性的实验研究与数值计算 [D ] . 西安交通大学， 1990 ．

WANG Qian . WANG Qian . Experimental study and numerical calculation of the binstability of vapor-liquid two-phase flow in a vertical as cending pipe[D ] . Xian Jiaotong University , 1990 ．

张鑫 , 刘朝晖 , 毕勤成 , 吕海财 , 杨冬 . 倾斜内螺纹管中超临界水的传热和流动阻力特性研究 [J ] . 西安交通大学学报 , 2020 , 54 ( 12 ): 106 - 115 .

ZHANG Xin , LIU Zhaohui , BI Qincheng , et al . Heat transfer and resistance characteristics of water in an inclined internally ribbed tube under supercritical pressure conditions [J ] . Journal of Xi'an Jiaotong University , 2020 , 54 ( 12 ): 106 - 115 .

ZHAO Jiyun ,. Stability analysis of supercritical water cooled reactors [D ] . Cambridger MA : Massachusetts Institute of Technology , 2005 .

辛亚飞 , 聂超 , 毕凌峰 , 等 . 倾斜管内汽水两相流动不稳定特性的数值分析 [J ] . 电力科技与环保 , 2022 , 38 ( 3 ): 195 - 201 .

XIN Yafei , NEI Chao , BI Lingfeng , et al . Numerical analysis of unstable characteristics of steam-water two-phase flow in inclined pipe [J ] . Electric Power Technology and Environmental Protection . 2022 , 38 ( 3 ): 195 - 201 .

王志勇 , 李维腾 , 堵根旺 , 等 . 自然循环锅炉深度调峰时水冷壁汽水两相流动不稳定特性计算及安全分析 [J ] . 热力发电 , 2024 , 53 ( 11 ): 119 - 129 .

WANG Zhiyong, LI Weiteng, DU Genwang, Calculation and safety analysis of unstable characteristics of two Phase flow in water wall during deep peak shaving of natural circulation boiler [J ] . Thermal Power Generation , 2024 , 53 ( 11 ): 119 - 129 .

毕凌峰 , 杜晓成 , 张西容 , 等 . 基于频域法的超超临界锅炉水冷壁动态特性模型验证及计算分析 [J ] . 动力工程学报 , 2023 , 43 ( 12 ): 1557 - 1566 .

BI Lingfeng , DU Xiaocheng , ZHANG Xirong , et al . Model verification and calculation analysis of dynamic characteristics of water wall of ultra-supercritical boiler based on frequency domain method [J ] . Journal of Power Engineering , 2023 , 43 ( 12 ): 1557 - 1566 .

茆凯源 , 聂鑫 , 谢海燕 , 等 . 超超临界1000 MW二次再热机组锅炉水动力及流动不稳定性计算分析 [J ] . 热力发电 , 2017 , 46 ( 08 ): 36 - 41 .

MAO Kaiyuan , NIE Xin , XIE Haiyan , et al . Computational analysis on hydrodynamic characteristics and flow instability of an ultra supercritical 1 000 MW double-reheat unit boiler . [J ] . Thermal Power Generation , 2017 , 46 ( 08 ): 36 - 41 .

SHIN C W , NO H C . Experimental study for pressure drop and flow instability of two-phase flow in the PCHE-type steam generator for SMRs [J ] . Nuclear Engineering and Design , 2017 , 318 : 109 - 118 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Analysis of Flow Instability and Dynamic Characteristics in Water Wall of 350 MW Ultra-Flexible Boiler During Deep Peak-Shaving Operation

Sensitivity Analysis of Foil Geometrical Parameters for the Third-Generation CO2 Gas Foil Bearings Based on Design of Experiments Method

Study on Dynamic Characteristics Analysis of 350 MW-Scale Advanced Adiabatic Compressed Air Energy Storage System

Analysis of the Impact of Helium-Xenon Mixture Ratio on the Dynamic Characteristics of the Brayton Cycle Systems

Calculation and Analysis of Flow Instability Characteristics in Water Wall of Supercritical Circulating Fluidized Bed Boiler During Deep Peak Shaving

Related Author

WEI Ziyu

ZHU Tianru

YU Tingting

YIN Yaning

WANG Ting

YANG Dong

LI Jun

LI Zhigang

Related Institution

The National Key Laboratory of Low-Carbon Thermal Power Generation Technology and Equipment, Harbin Boiler Company Limited

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University

Institute of Turbomachinery，Xi'an Jiaotong University

China Energy Engineering Group Yunnan Electric Power Design Institute Co., Ltd.

Yunnan Provincial Energy Investment Group Co., Ltd.

⁰