流体机械

2020, v.48;No.576(06) 44-50

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汽轮机高压旁路翼型阀芯调节阀调节特性
Regulation Characteristics of High-pressure Bypass Valve with Airfoil-shaped Spool for Steam Turbine

王海民;胡峰;陈睿池;陈思;
Wang Haimin;Hu Feng;Chen Ruichi;Chen Si;School of Energy and Power Engineering,University of Shanghai for Science and Technology;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer for Power Engineering;

摘要(Abstract):

高压旁路调节阀是汽轮机高压旁路系统中最重要的构成部分,本文针对某300MW汽轮机组高压旁路系统调节阀,利用NACA6409翼型上表面型线为其设计了一种翼型结构的阀芯。利用数值模拟方法研究了不同进口水蒸汽参数和减温水喷淋参数条件下,阀腔内压力、温度以及液相体积分数分布特征,并研究了阀芯开度对高压旁路调节阀内部流场的影响,最后研究减温水喷射孔数量和布置方式的改变对阀腔内流场参数以及减温减压效果的影响。
The high pressure bypass control valve is one of the most important components for high pressure bypass system of steam turbine.In this work,an airfoil-shaped spool was designed using the upper surface profile of airfoil NACA6409 for a regulating valve in the bypass system of a 300 MW turbine unit.The numerical simulation method was used to study the pressure,temperature and liquid volume fraction distribution characteristics inside the valve chamber under different inlet water vapor parameters and desuperheating water spraying parameters.The effect of the spool opening on the internal flow field of the high pressure bypass regulating valve was also studied.Finally,the effects of change in number and arrangement of the desuperheating water injection nozzles on the flow field parameters in the valve chamber and desuperheating and pressure reduction effect were studied,too.

关键词(KeyWords): 汽轮机;高压旁路系统;调节阀;翼型阀芯;减温水
steam turbine;high-pressure bypass system;regulating valve;airfoil-shaped spool;spray water

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基金项目(Foundation): 国家自然科学基金项目(51106099);; 2014年上海市军民结合专项项目(26)

作者(Author): 王海民;胡峰;陈睿池;陈思;
Wang Haimin;Hu Feng;Chen Ruichi;Chen Si;School of Energy and Power Engineering,University of Shanghai for Science and Technology;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer for Power Engineering;

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