摘要
以燃气轮机气体燃料控制阀为研究对象,基于计算流体力学方法,研究了气体燃料控制阀在实际运行工况下的流场分布以及流量变化规律,拟合了该阀的流动特性曲线。结果表明:在阀前压力2.650 MPa、阀后与阀前压力比为0.49~0.78,相同开度下的控制阀质量流量与阀后压力变化无关,处于阻塞流状态;相同压比下的流量系数与开度近似线性相关,与工程实际要求相吻合;流量系数与喉部面积具有线性相关关系,通过优化阀芯型线,改善喉部面积随开度的线性曲线,提高了流量特性曲线的线性度。
Taking the gas fuel control valve of gas turbine as the research object,based on the computational fluid dynamics method,the flow field distribution and flow change rule of the gas fuel control valve under the actual operating conditions are studied,and the flow characteristic curve of the valve is fitted.The results show that the mass flow of the control valve at the same opening has nothing to do with the change of the pressure behind the valve,and is in a blocked flow state when the pressure in front of the valve is 2.650 MPa and the pressure ratio behind the valve to that in front of the valve is 0.49~0.78;Under the same pressure ratio,the discharge coefficient is approximately linear with the opening,which is consistent with the actual requirements of the project;There is a linear correlation between the flow coefficient and throat area.By optimizing the valve core profile,the linear curve of throat area with opening is improved,and the linearity of the flow characteristic curve is improved.
作者
徐前
朱志劼
范雪飞
刘网扣
李连翠
徐望人
XU Qian;ZHU Zhijie;FAN Xuefei;LIU Wangkou;LI Liancui;XU Wangren(Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)
出处
《热力发电》
CAS
CSCD
北大核心
2023年第10期162-169,共8页
Thermal Power Generation
基金
国家科技重大专项(J2019-V-0014-0109)。
关键词
气体燃料控制阀
流量系数
特性曲线
数值计算
gas fuel control valve
flow coefficient
characteristic curve
numerical calculation