热力透平2026，Vol.55Issue(3)：184-192,9.DOI:10.13707/j.cnki.31-1922/th.2026.03.003
汽轮机空心静叶表面液膜蒸发特性研究
Study on Influence of Internal Heating on Evaporation Characteristics of Liquid Films on Turbine Stator Blade Surfaces
王陈寅 1谢永慧 2张荻 3韦俊 4常倩倩 4封星宇4
作者信息
- 1. 西安交通大学国家储能技术产教融合创新平台(中心),西安 710049
- 2. 西安交通大学国家储能技术产教融合创新平台(中心),西安 710049||西安交通大学 能源与动力工程学院,西安 710049
- 3. 西安交通大学 能源与动力工程学院,西安 710049
- 4. 中国船舶集团有限公司第七〇三研究所,哈尔滨 150078
- 折叠
摘要
Abstract
Liquid film formation caused by droplet deposition on wet-steam turbine stator blades can induce water erosion.In this study,a last-stage stator blade of a steam turbine is selected as the research object,and the droplet transport,wall-film formation,and liquid-film evolution under internal heating conditions are numerically investigated using an Eulerian-Lagrangian framework.The continuous phase is solved using shear stress transport k-ω turbulence model(SST k-ω),while droplet phase is tracked using the discrete phase model.A wall-film boundary condition is applied to outer blade surface to describe liquid-film formation and evolution after droplet impingement,and a condensation heat-transfer boundary condition is imposed on inner blade surface to represent heat input from internal heating steam to blade wall.The results are as follows:(1)The internal heating has little influence on pressure field and Mach number distribution in the stator passage,and the main aerodynamic structure remains essentially unchanged.However,it significantly increases the temperatures of blade wall and near-wall region;(2)The droplet transport distributions in the main flow passage are similar before and after heating,indicating that moisture removal effect of internal heating is mainly reflected in evaporation and retention behavior of the wall film after droplet impingement;(3)Under unheated condition,the liquid film is mainly concentrated on pressure surface and continues to accumulate during the simulated period;(4)After internal heating is applied,the film regions with high mass value on blade surface are markedly reduced,and the local maximum wall-film mass decreases significantly.At t=0.009 s,the total wall-film mass on blade surface decreases from approximately 5.72×10-5 kg under unheated condition to approximately 1.02×10-5 kg under heated condition,corresponding to a reduction of about 82.2%.These results indicate that internal heating can enhance liquid-film evaporation on blade surface without substantially altering main aerodynamic structure,thereby effectively suppressing liquid-film accumulation on the stator blade surface.This study provides a reference for design of internally heated hollow stator blades for moisture removal in wet-steam turbines.关键词
湿蒸汽汽轮机/静叶/内部加热/离散相模型/拉格朗日壁膜模型/液膜演化Key words
wet steam turbine/stator blade/internal heating/discrete phase model/Lagrangian wall film model/liquid film evolution分类
能源科技引用本文复制引用
王陈寅,谢永慧,张荻,韦俊,常倩倩,封星宇..汽轮机空心静叶表面液膜蒸发特性研究[J].热力透平,2026,55(3):184-192,9.
