末级透平对低压缸气动和凝结特性的影响

李瑜 1; 李亮 1; 钟刚云 2; 吴其林 2

您当前的位置：

首页 >

文章列表页 >

末级透平对低压缸气动和凝结特性的影响

更新时间：2025-07-09

- 末级透平对低压缸气动和凝结特性的影响
- Influence of Last Stage Turbine on Aerodynamic Performance and Condensation Characteristic of Low Pressure Cylinder
- 西安交通大学学报 2012年46卷第7期页码：16-20+86
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TK262
- 网络首发：2012-07-10，
  
  纸质出版：2012
- 稿件说明：
移动端阅览
李瑜 1, 李亮 1, 钟刚云 2, 等. 末级透平对低压缸气动和凝结特性的影响[J]. 西安交通大学学报, 2012,46(7):16-20+86.

Influence of Last Stage Turbine on Aerodynamic Performance and Condensation Characteristic of Low Pressure Cylinder[J]. 2012, 46(7): 16-20+86.
李瑜 1, 李亮 1, 钟刚云 2, 等. 末级透平对低压缸气动和凝结特性的影响[J]. 西安交通大学学报, 2012,46(7):16-20+86. DOI：

Influence of Last Stage Turbine on Aerodynamic Performance and Condensation Characteristic of Low Pressure Cylinder[J]. 2012, 46(7): 16-20+86. DOI：

摘要

采用湿蒸汽非平衡凝结流动模型对某300 MW汽轮机末级透平改型的气动性能及低压缸总体气动和湿蒸汽凝结特性进行了对比研究

末级透平的单独计算结果表明:改型后末级透平的通流能力、功率和效率均有明显提高

余速损失明显降低.改型后的末级透平置于低压缸多级透平环境中的计算结果表明:低压缸的功率和效率分别提高了0.53%和0.47%

末级余速损失降低是低压缸性能提高的主要因素; 末级透平改型不仅会影响末级的气动性能

而且会影响次末级的总焓降; 改型后末级动叶沿叶高的过冷度降低了3～5 K

成核范围和成核率均明显减小

其余各级凝结特性的改变可以忽略; 在低压透平改型中

末级可以独立对待

单独优化.

Abstract

The numerical simulation was performed with a non-equilibrium condensing flow model to investigate the influences of the redesigned last stage turbine on the aerodynamic performance of the last stage

and the overall aerodynamic performance and condensation characteristics of the low pressure cylinder of a 300 MW steam turbine. The computation for the isolated last stage turbine shows that the flow capacity

power output and efficiency are obviously improved

and the leaving velocity loss is clearly reduced after redesign. The analyses of the low pressure cylinder were conducted when the redesigned last stage turbine was placed in its right place in the multi-stage environment. The results show that the power output and efficiency of the low pressure cylinder rise by 0.53% and 0.47%

respectively. The improvement of the low pressure cylinder performance is attributed to the significant decrease in the leaving velocity loss. The redesign can affect the enthalpy drop in the penultimate stage turbine as well as the aerodynamic performance of the last stage turbine. The supercooling degree drops by 3-5 K in the spanwise direction

and the nucleation region and the nucleation rate also decrease in the final rotor passage. The change of the condensation characteristics of the rest stages due to the redesign can be neglected. These results imply that the last stage can be isolated from the multi-stage turbine and optimized separately in the redesign process of a low pressure cylinder.

关键词

Keywords

references

MOORE M J, SIEVERDING C H. Two-phase steam flow in turbines and separators [M]. Washington DC, USA:Hemisphere Publishing Corporation, 1976.

李亮,程代京,丰镇平,等.汽轮机湿蒸汽级中凝结流动的三维数值分析 [J].工程热物理学报, 2006, 27(4):571-573.

LI Liang, CHENG Daijing, FENG Zhenping, et al. Three-dimensional simulation of the condensing flow in the wet steam stages of a steam turbine [J]. Journal of Engineering Thermophysics, 2006, 27(4):571-573.

王仲奇,郑严.叶轮机械弯扭叶片的研究现状及发展趋势 [J].中国工程科学, 2000, 2(6):40-48.

WANG Zhongqi, ZHENG Yan. Research status and development of the bowed-twisted blade for turbomachines [J]. Engineering Science, 2000,2(6):40-48.

SIGG R, HEINZ C, CASEY M V, et al. Numerical and experimental investigation of a low-pressure steam turbine during windage [J]. IMechE: Part A Journal of Power and Energy, 2009, 223(6):697-708.

程凯, 彭泽瑛.末级长叶片几何参数对汽轮机流场气动性能的影响 [J].热力透平, 2008, 37(3):168-173.

CHENG Kai, PENG Zeying. Influence of geometric parameters of last stage blade on turbine flow field characteristics [J]. Thermal Turbine, 2008, 37(3):168-173.

WAGNER W, KRUSE A. Properties of water and steam: the industrial standard IAPWS-IF97 for the thermodynamic properties and supplementary equations for other properties tables based on these equations [M]. Berlin, Germany: Springer-Verlag, 1998.

LI Liang, LI Yu, WU Lianwei, et al. Numerical study on the condensing flow in the low pressure cylinder of a 300 MW steam turbine [C]∥Proceeding of ASME Turbo Expo 2010. New York, USA:ASME, 2010:2289-2296.

何纬峰,戴义平.环境风速对空冷凝汽器运行性能的影响.2011,45(5):31-35.

郭宪民,王善云,汪伟华,等.环境参数对空气源热泵蒸发器表面霜层影响研究.2011,45(3):30-34.

何纬峰,戴义平,马庆中,等.环境风影响下直接空冷单元背压预测研究.2011,45(1):15-20.

严俊杰,王进仕,胡申华,等.存在温度梯度的竖直壁面Marangoni凝结换热特性研究.2008,42(1):46-51.

严俊杰,李杨,乔磊,等.水-酒精混合蒸气在竖直管外凝结特性的研究.2007,41(11):1342-1347.

吴晓明,李国君,丰镇平,等.SST k-ω-kp两相湍流模型及其在湿蒸汽凝结流动数值模拟中的应用.2007,41(5):526-529.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

带挡板结构的平面叶栅凹槽叶顶气膜冷却特性

采用试验设计方法的第三代CO2气体箔轴承箔片几何参数敏感性分析

混合电解槽阵列协同的风光耦合制氢系统双层多目标优化

电子级超纯氮深冷空分流程节能优化研究

融合物理信息与深度算子网络的变压器绕组热-流场快速计算方法