Study on Structure Optimization of Exhaust Steam Passage of Steam Turbine in Large Coal-fired Power Station

Yuting WANG; Yanqi CHEN; Gang XU; Heng CHEN

doi:10.12096/j.2096-4528.pgt.21067

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Study on Structure Optimization of Exhaust Steam Passage of Steam Turbine in Large Coal-fired Power Station

Intelligent Turbine Power Generation Technology | 更新时间：2025-07-04

- Study on Structure Optimization of Exhaust Steam Passage of Steam Turbine in Large Coal-fired Power Station
- Power Generation Technology Vol. 42, Issue 4, Pages: 464-472(2021)
- 作者机构：
  
  华北电力大学能源动力与机械工程学院, 北京市昌平区 102206
- 作者简介：
- 基金信息：
  
  National Natural Science Fundation of China(51806062);Fundamental Research Funds for the Central Universities(2020MS006)
- DOI：10.12096/j.2096-4528.pgt.21067
  CLC： TK05
- Received：28 May 2021，
  
  Published：31 August 2021
- 稿件说明：
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Yuting WANG, Yanqi CHEN, Gang XU, et al. Study on Structure Optimization of Exhaust Steam Passage of Steam Turbine in Large Coal-fired Power Station[J]. Power Generation Technology, 2021, 42(4): 464-472.
DOI：

Yuting WANG, Yanqi CHEN, Gang XU, et al. Study on Structure Optimization of Exhaust Steam Passage of Steam Turbine in Large Coal-fired Power Station[J]. Power Generation Technology, 2021, 42(4): 464-472. DOI： 10.12096/j.2096-4528.pgt.21067.

摘要

针对河北某电厂600 MW湿冷机组，运用ANSYS Fluent软件对汽轮机排汽通道流场进行数值模拟。研究发现：在原设计下，由于排汽缸轴向排汽及凝汽器接颈存在扩散角，排汽通道内出现了较大的低速漩涡区域，对凝汽器换热性能具有负面作用，而给水泵汽轮机排汽对低速漩涡区域具有一定的补充作用，能够一定程度上改善流场。针对这种现象，通过设计导流结构，对排汽通道流场进行了优化，结果表明：经过流场优化后，机组排汽在主凝结区最上层管束平面处的流速均匀性得到了显著提升，从而有利于提高凝汽器换热系数、降低机组背压、提升机组发电效率。

Abstract

For a 600 MW wet-cooled unit of a power plant in Hebei province

ANSYS Fluent software was used to numerically simulate the flow field of the steam turbine exhaust passage. It was found that under the original design

due to the axial exhaust steam of the exhaust cylinder and the diffusion angle of the condenser neck

a large low-speed vortex area appeared in the exhaust steam passage

which had a negative effect on the heat transfer performance of the condenser. The exhaust steam of the feed water pump steam turbine had a certain supplementary effect on the low-speed vortex area and could improve the flow field to a certain extent. Aiming at this phenomenon

the exhaust passage flow field was optimized through the design of diversion structures. The results show that after optimizing the flow field

the crew exhaust steam condensed in the main area of the upper tube bundle planar velocity uniformity has been significantly increased

which is benefit to improve the condenser heat transfer coefficient

reduce the unit back pressure

and promote the efficiency of generating units.

关键词

Keywords

references

沈士一, 庄贺庆, 康松, 等. 汽轮机原理[M]. 北京: 中国电力出版社, 1992: 125-130.

SHEN S Y, ZHUANG H Q, KANG S, et al. The steam turbine principle[M]. Beijing: China Electric Power Press, 1992: 125-130.

钟达文, 孟继安, 朱晓磊, 等. 600MW机组凝汽器壳侧数值模拟与应用[J].汽轮机技术, 2019, 61(2): 127-130.

ZHONG D W, MENG J A, ZHU X L, et al. 600MW condenser shell side of the numerical simulation and application[J]. Turbine Technology, 2019, 61(2): 127-130.

VEERABATHRASWAMY K, SENTHIL K A. Effective boundary conditions and turbulence modeling for the analysis of steam turbine exhaust hood[J]. Applied Thermal Engineering, 2016,103: 773-780.

LIN A Q, CHANG X Y, CAO L H, et al. Effect of wet steam on aerodynamic performance of low-pressure exhaust passage with last stage blade[J]. Journal of Applied Fluid Mechanics, 2019, 12(6): 1837-1845.

BEEVERS A, CONGIU F, PENGUE F, et al. An analysis of the merits of CFD for the performances prediction of a low pressure steam turbine radial diffuser[C]//ASME Turbo Expo: Power For Land, Sea and Air, Glasgow, UK, 2010.

ZOE B, GRANT L, SIMON H. A literature review of low pressure steam turbine exhaust hood and diffuser studies[J]. Journal of Engineering for Gas Turbines and Power, 2013, 135: 256-262.

曹丽华, 郭婷婷, 李勇. 300 MW汽轮机凝汽器喉部出口流场的三维数值模拟[J]. 中国电机工程学报, 2006, 26(11): 56-59.

CAO L H, GUO T T, LI Y. Three-dimensional numerical simulation of the outlet flow field of the 300 MW steam turbine condenser throat[J]. Proceedings of the CSEE, 2006, 26(11): 56-59.

陈裕. 凝汽器喉部排汽优化改造的实用性分析[J]. 发电设备, 2017, 31(5): 353-355.

CHEN Y. Retrofit analysis for exhaust mode optimization of a condenser throat[J]. Power Equipment, 2017, 31(5): 353-355.

WANG H, ZHU X, DU Z. Aerodynamic optimization for low pressure turbine exhaust hood using Kriging surrogate model[J]. International Communications in Heat and Mass Transfer, 2010, 37(8): 998-1003.

ZHANG L Y, GAN X P, FRANCESCO C G, et al, Performance prediction and optimization of low pressure steam turbine radial diffuser at design and off-design conditions using streamline curvature method[J]. Journal of Engineering for Gas Turbines and Power-Transactions of The ASME, 2017, 139(7): 152-160.

WANG H, ZHU X, DU Z, et al. Aerodynamic optimization system development for low pressure exhaust hood of steam turbine[C]//ASME Turbo Expo: Power for Land, Sea,&Air. 2010: 2139-2148.

GRIBIN V G, PARAMONOV A N, MITROKHOVA O M. The effect of condensing steam turbine exhaust hood body geometry on exhaust performance efficiency[J]. Thermal Engineering, 2018, 65(6): 371-378.

CAO L, LIN A, LI Y, et al, Optimum tilt angle of flow guide in steam turbine exhaust hood considering the effect of last stage flow field[J]. Chinese Journal of Mechanical Engineering, 2017, 30(4): 1-9.

杨新健. 大型汽轮机排汽通道流场三维数值模拟[D]. 北京: 华北电力大学, 2014.

YANG X J. Three-dimensions numerical simulation of flow field in exhaust passage of large steam turbine[D]. Beijing: North China Electric Power University, 2014.

张勇, 贾昌盛, 许衍军. 凝汽器喉部流场数值模拟[J]. 发电设备, 2018, 32(6): 383-386.

ZHANG Y, GU C S, XU Y J. Numerical simulation of the flow field in a condenser throat[J]. Power Equipment, 2018, 32(6): 383-386.

刘康. 1000MW湿冷机组冷端系统汽侧流场优化研究[D]. 北京: 华北电力大学, 2017.

LIU K. Optimization research for steam flow field of cold-end system in a 1000MW wet-cooling unit[D]. Beijing: North China Electric Power University, 2017.

FREITAS C J. The issue of numerical uncertainty[J]. Applied Mathematical Modelling, 2002, 25(2): 237-248.

上原春男, 藤井哲, 朱永荃. 表面式凝汽器的总传热系数和热力计算[J]. 电站辅机, 1984(1): 21-34.

HARUO U, FUJII Z, ZHU Y Q. The total heat transfer coefficient and surface type condenser thermodynamic calculation[J]. Power station auxiliary equipment, 1984(1): 21-34.

周兰欣, 邢朱苗, 陈素敏. 小机排汽对凝汽器喉部流场影响的三维数值分析[J]. 华北电力大学学报(自然科学版), 2009, 36(3): 72-75.

ZHOU L X, XING Z M, CHEN S M. Three-dimensional numerical simulation of the influence of the exhausting of small turbine to the turbine's condenser throat[J]. Journal of North China Electric Power University (Natural Science Edition), 2009, 39(3): 72-75.

JIANG X Q, LIN A Q, MALIK A, et al. Numerical investigation on aerodynamic characteristics of exhaust passage with consideration of multi-factor components in a supercritical steam turbine[J]. Applied Thermal Engineering, 2019, 162: 152-159.

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