汽轮机静叶表面水膜缝隙抽吸的试验研究

李春国 1; 王新军 1; 关盼龙 1; 苏鹏飞 1; 孙弼 1; 周洪宇 2

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汽轮机静叶表面水膜缝隙抽吸的试验研究

更新时间：2025-05-08

- 汽轮机静叶表面水膜缝隙抽吸的试验研究
- Experimental Study on Removal of Water Film from Steam Turbine Stator Blade Surfaces by Suction Slots
- 西安交通大学学报 2009年43卷第1期页码：20-23+33
- 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：
  
  : 2008-03-11. 作者简介: 李春国(1977-),男,博士生;王新军(联系人),男,副教授. 基金项目: 国家高技术研究发展计划资助项目(2007AA05Z251)
- DOI：
  中图分类号： TK261
- 网络首发：2009-01-10，
  
  纸质出版：2009
- 稿件说明：
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李春国 1, 王新军 1, 关盼龙 1, 等. 汽轮机静叶表面水膜缝隙抽吸的试验研究[J]. 西安交通大学学报, 2009,43(1):20-23+33.

Experimental Study on Removal of Water Film from Steam Turbine Stator Blade Surfaces by Suction Slots[J]. 2009, 43(1): 20-23+33.
李春国 1, 王新军 1, 关盼龙 1, 等. 汽轮机静叶表面水膜缝隙抽吸的试验研究[J]. 西安交通大学学报, 2009,43(1):20-23+33. DOI：

Experimental Study on Removal of Water Film from Steam Turbine Stator Blade Surfaces by Suction Slots[J]. 2009, 43(1): 20-23+33. DOI：

摘要

在气液两相流试验装置上

对汽轮机空心静叶表面水膜缝隙抽吸进行了试验研究

并结合两相流动数值方法对水滴沉积的径向分布进行了探讨.试验条件为:叶栅进口空气湿度为7%

水滴直径分布在1.5～201 μm之间

抽吸缝隙宽度为1 mm

缝隙角度为45°.研究结果表明:吸力面上的抽吸缝在相对弧长约为0.5处具有最大的抽水效率

而压力面的抽吸缝隙越靠近尾缘处抽水效率越高

且压力面的缝隙抽水性能比吸力面的好

增加气流速度会引起抽水效率降低

增大缝隙抽吸压差可以提高抽水效率.另外

抽水效率沿着叶高方向是增加的.

Abstract

An experiment on the performance of water film removal from hollow stator blade surfaces of a steam turbine by slot suction was conducted on an air-water two-phase flow rig with an inlet air wetness of 7%

a droplet diameter range of 1.5-201 μm

a slot width of 1 mm and a slot angle of 45° to the blade surface. The investigation into the radial characteristic of the droplet deposition on the blade surface was also performed with the two-phase flow numerical simulation method based on the experiment data. The results show that a maximum water removal rate was obtained at a relative arc length of about 0.5 for the suction slot on the suction side

and for the suction slot on the pressure side the higher water removal efficiency was observed when the slot was nearer to the blade trailing edge. The water removal efficiency of the blade surfaces was greater for the suction slot on the pressure side than that on the suction side. Increasing airflow velocity resulted in the decrease of water removal efficiency

and larger suction pressure difference leaded to higher water removal efficiency. In addition

the water removal efficiency exhibited an increase in the radial direction of the blade.

关键词

Keywords

references

DEHOUVE J, NARDIN P, ZEGHMATI M. Erosion study of final stage blading of low pressure steam turbines [J]. Applied Surface Science, 1999, 144(3):238-243.

ALEXANDER S. Wet-steam turbines for nuclear power plants [M]. Tulsa, USA: Penn Well Corporation, 2005:191-216.

RYLEY D J, AI-AZZAWI H K. Suppression of the deposition of nucleated fog droplets on steam turbine stator blades by blade heating [J]. International Journal of Heat and Fluid Flow, 1983, 4(4):207-216.

SMITH A, CALDWELL J, CHRISTIE D G,et al. Physical aspects of blade erosion by wet steam in turbines and discussion [J]. Philosophical Transactions of the Royal Society of London:Mathematical and Physical Sciences, 1966, 260(1110):209-219.

王新军,卢澄,李振光,等.缝隙吹扫对静叶出口二次水滴直径影响的试验研究[J]. 西安交通大学学报, 2007, 41(7): 764-767.

WANG Xinjun, LU Cheng,LI Zhenguang, et al. Experimental study on effects of slot hot gas blowing on secondary water droplet diameter downstream of the stationary blade [J]. Journal of Xi'an Jiaotong University, 2007, 41(7): 764-767.

RELEY D J, PARKER G J. The removal of water from low-pressure steam turbine blades by trailing-edge suction slots [J]. Proceeding of Institute Mechanical Engineers,1970, 182(3):94-103.

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王新军,高铁瑜,徐廷相.缝隙抽吸对二次水滴直径及直径分布影响的试验研究[J]. 汽轮机技术, 2004, 46(6): 444-450.

WANG Xinjun, GAO Tieyu, XU Tingxiang. Experimental study on effects of suction on secondary water droplet diameter and its distribution [J]. Turbine Technology, 2004,46(6):444-450.

WANG Xinjun, XU Tingxiang, LI Yanfeng. Effects of water suction on water film tearing at trailing [J]. Heat Transfer: Asian Research, 2005, 34(6): 380-385.

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