Flow Characteristics and Loss Distribution of Overload Valve in Supercritical Steam Turbine

被引：0
|
作者：
Cao L. [1 ]
Zhao D. [1 ]
Si H. [1 ]
机构：
[1] School of Energy and Power Engineering, Northeast Electric Power University, Jilin Province, Jilin
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 10期
基金：
中国国家自然科学基金;
关键词：
flow characteristics; overload valve; structural optimization; supercritical steam turbine; total pressure loss;
D O I：
10.13334/j.0258-8013.pcsee.220043
中图分类号：
学科分类号：
摘要：
Aiming at the problems of complex flow and low efficiency in the overload valve of ultra supercritical steam turbine, a two-stage overload valve flow model of high-pressure cylinder is established by Computational Fluid Dynamics Software CFX. The performance and loss of the overload valve is analyzed. The flow characteristics, aerodynamic characteristics and flow loss distribution of the flow field in four overload valves are compared. The flow characteristics and loss mechanism of the overload valve are revealed, and an optimized structure of overload valve with better performance is obtained. The results show that there are always vortices in the chamber with different positions and sizes. The pressure distribution of the valve with middle-inlet bend pipe is relatively uniform, the total pressure loss is small, and the viscosity loss in the chamber is also the smallest. The viscosity loss in the chamber of the side-inlet bend pipe is the smallest. The viscosity loss of the valve with middle-inlet bend pipe is less than that in the middle-inlet straight pipe. The flow efficiency of the middle-inlet bend pipe is good, and the overall loss of the overload valve is small. ©2023 Chin.Soc.for Elec.Eng.
引用
收藏
页码：3894 / 3903
页数：9
相关论文
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