Numerical Simulation of Flow Characteristics and Forces on Valve Disc for a Combined Inlet Valve

doi:10.7652/xjtuxb201612023

您当前的位置：

首页 >

文章列表页 >

Numerical Simulation of Flow Characteristics and Forces on Valve Disc for a Combined Inlet Valve

更新时间：2025-07-09

- Numerical Simulation of Flow Characteristics and Forces on Valve Disc for a Combined Inlet Valve
- Vol. 50, Issue 12, Pages: 148-154(2016)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201612023
  CLC： TK26
- Online First：10 December 2016，
  
  Published：2016
- 稿件说明：
移动端阅览
Numerical Simulation of Flow Characteristics and Forces on Valve Disc for a Combined Inlet Valve[J]. 2016, 50(12): 148-154.
DOI：

Numerical Simulation of Flow Characteristics and Forces on Valve Disc for a Combined Inlet Valve[J]. 2016, 50(12): 148-154. DOI： 10.7652/xjtuxb201612023.

摘要

针对联合进汽阀流道内因湍流、旋涡产生压损

进而降低汽轮机组经济性这一问题

建立由两个主汽阀E、F及左侧次大调节阀B、中间最小调节阀A、右侧最大调节阀C构成的某进口联合进汽阀的三维数值模型

并进行不同工况模拟计算。主要研究阀C和阀B全开时

阀内流动特性、各阀压损以及阀碟各表面受力随阀A开度增大而变化的情况。研究发现

在小开度下

阀A迎风侧为贴附阀碟流

并且阀座迎风侧存在大旋涡

随着阀A开度的增大整体流场趋于平稳

迎风侧和背风侧流体转变为两股射流

阀碟内腔中的低速流体区仅位于阀座喉部及以上区域

但阀碟内腔会出现小旋涡。随着阀A开度的增大

阀A压损逐渐较减小

阀B和阀C压损基本维持不变

主汽阀E和F压损随阀A开度增大而继续增大。阀A阀碟所受纵向力在阀A开度小于80%时随开度增大而减小

在开度大于80%时则相反。阀B阀碟和阀C阀碟所受纵向力基本不随阀A开度的变化而变化。阀A阀碟、阀B阀碟和阀C阀碟的横向受力随阀A开度的增大而增大。

Abstract

The turbulence and vortex inside combined inlet valve flow passage may easily induce pressure loss

and then lead to adverse effects on the efficiency of steam turbine units. To study the above mentioned problems

a three-dimensional numerical model of an combined inlet valve is constructed. The combined inlet valve system consists of two main steam valves

the largest valve C on the right

the second size valve B on the left and the minimum valve A in the middle. The variations of the flow characteristics inside the valves

the pressure loss of the valves and the force distribution on the valve disc surfaces with the increase of valve A opening are investigated when valve B and valve C are fully opened. It is found that fluid attaches to valve disc at the windward side of annular channel

and there exists maelstrom at seat windward side when valve A is slightly opened. The whole flow field tends to be steadier with the increase in opening of valve A. Two jet flows appear at the windward side and leeward side

and the low-speed fluid in the valve disc lumen area locates in or above the valve seat throat with small vortex inside the valve disc lumen. With the increase in opening of valve A

pressure loss of valve A decreases gradually

pressure losses of valve B and valve C are nearly unchanged

and pressure losses of the main steam valve E and F continue to increase. The longitudinal force imposed on disc of valve A decreases with its opening when the opening is less than 80%

and it is opposite when the opening is greater than 80%. The increase in opening of valve A has no effect on longitudinal forces imposed on discs of valve B and valve C. The lateral force on disc of valve A increases with the increase in opening of valve A

while the lateral forces on discs of valve B has no and valve C continue to increase with the increase in opening of valve A.

关键词

Keywords

references

朱松强, 马会民, 桑如波, 等. 600 MW机组主调汽门系统运行工况的分析 [J]. 动力工程, 2005, 25(3): 312-315.

ZHU Songqiang, MA Huimin, SANG Rubo, et al. Analysis of the operational behavior of a 600 MW steam turbine set's main stop and governing valve system [J]. Power Engineering, 2005, 25(3): 312-315.

鲍文, 于达仁, 胡清华, 等. 汽轮机主汽阀、调节阀常见故障分析及诊断 [J]. 汽轮机技术, 2000, 42(6): 360-364.

BAO Wen, YU Daren, HU Qinghua, et al. Analysis and detection on the fault of main steam valve and governor valve [J]. Turbine Technology, 2000, 42(6): 360-364.

于达仁, 项庆化, 隋岩峰. 汽轮机调节系统阀杆卡涩故障在线检测方法 [J]. 中国电机工程学报, 2001, 21(12): 59-62.

YU Daren, XIANG Qinghua, SUI Yanfeng. On-line detection method for jam faults of the servo valve piston in the steam turbine governing system [J]. Proceedings of the CSEE, 2001, 21(12): 59-62.

唐贵基, 倪守龙, 卢盛阳. 600 MW超临界汽轮发电机组振动故障分析与处理 [J]. 电站系统工程, 2013, 29(3): 44-46.

TANG Guiji, NI Shoulong, LU Shengyang. Vibration fault analysis and processing of 600 MW supercritical turbo unit [J]. Power System Engineering, 2013, 29(3): 44-46.

张学延, 王延博, 张卫军. 大型汽轮机汽流激振问题的分析与处理 [J]. 热力发电, 2004(2): 47-55.

ZHANG Xueyan, WANG Yanbo, ZHANG Weijun. Analysis and processing of flow excited vibration of large steam [J]. Thermal Power Generation, 2004(2): 47-55.

张平, 赵立, 王振华, 等. 600 MW机组高压调门典型事故分析及处理 [J]. 中国电业(技术版), 2011(12): 41-44.

ZHANG Ping, ZHAO Li, WANG Zhenhua, et al. Typical accident analysis and treatment for high-pressure control valve in 600 MW power units [J]. China Electric Power(Technology Edition), 2011(12): 41-44.

SRIKANTH C, BHASKER C. Flow analysis in valve with moving grids through CFD techniques [J]. Advances in Engineering Software, 2009, 40(3): 193-201.

李斌. 基于CFD的调节阀内部流场的研究 [D]. 兰州: 兰州理工大学, 2009: 45-62.

徐克鹏, 蔡虎, 崔永强, 等. 600 MW 汽轮机高压联合进汽阀内部流场的数值模拟 [J]. 工程热物理学报, 2001, 22(5): 555-558.

XU Kepeng, CAI Hu, CUI Yongqiang, et al. Numerical simulation of the flow field inside high pressure combined valve of a 600 MW steam turbine [J]. Journal of Engineering Thermophysics, 2001, 22(5): 555-558.

朱奇, 谷传纲, 戴韧. 超超临界百万千瓦汽轮机主调阀流场非稳态数值研究 [J]. 动力工程学报, 2010, 30(10): 743-754.

ZHU Qi, GU Chuangang, DAI Ren. Numerical simulation on unsteady flow field in the main stop and control valve system of a 1000 MW ultra-supercritical steam turbine [J]. Journal of Chinese Society of Power Engineering, 2010, 30(10): 743-754.

LIU Guanwei, WANG Shunsen, GUO Hui, et al. Investigation on flow characteristics and stability of control valves for steam turbines [C]∥ASME Turbo Expo 2008: Power for Land, Sea, and Air. New York, USA: ASME, 2008: 811-820.

SHARARA A, HASSAN A, SABER E, et al. Flow investigation for self-excited vibration in a globe control valve [J]. Alexandria Engineering Journal, 2010, 49(2): 101-114.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Distribution of Flow Pattern in Control Valves and Identification of Flow Pattern Transition by Sound Mutation

Study of the Mechanism of Electrostatic Accumulation and Current Density Distribution Characteristics During Liquid Hydrogen Pipeline Transportation

Numerical Simulation of Space Charge Distribution Characteristics of Polyimide Materials under X-Ray Irradiation

Numerical Simulation Study on Geothermal Extraction Characteristics of Supercritical CO2 in Heterogeneous Fractures

Action Mechanism of Heat Transfer between the Working Medium and the Impeller on Aerodynamic Performance and Flow Characteristics of Radial Inflow Turbines with Supercritical Carbon Dioxide

Related Author

曾立飞 1

刘观伟 1

毛靖儒 1

袁奇 1

王朝阳 1

魏龙 1

张俊杰 2

徐亚涛 2

Related Institution

Institute of Turbomachinery, Xi'an Jiaotong University

School of Energy and Power Engineering，Xi’an Jiaotong University

Aerospace System Engineering Shanghai

School of Electrical Engineering，Xi’an Jiaotong University

Northwest Institute of Nuclear Technology

⁰