摘要
利用FLUENT对某AP1000核电汽轮机中压阀内的两相流动进行数值模拟。分别对调节阀在90°、40°、10°3种开度下的两相流与单相流流场比较分析,并对阀门压损以及影响压损的因素进行研究。结果表明:两相流在阀内的最大流速低于同等开度下单相流的最大流速,湿蒸汽两相流随开度的压损变化规律与单相流相似,但两相流的压损将近为单相流的两倍;蒸汽中水滴粒径大小对压力损失的影响较小,而蒸汽含水率对阀门压损影响非常大。
The software FLUENT is used to make the numerical simulations for the two-phase flow in mid-pressure valve of AP1000 nuclear steam turbine. The two-phase flow and single phase flow fields are analyzed under control valve＇ s three openings of 90°, 40°, 10° The pressure loss of the valve and the influence factors of pressure loss are also studied. Simulation results show that the maximum velocity of two-phase flow inside the valve is lower than the maximum velocity of single phase flow under the same opening. With the opening of the valve changing, pressure loss＇ s changing law of the two- phase flow is similar to the single phase flow, however, the pressure loss of the two-phase flow is nearly twice of the single phase flow. The size of water droplets in the steam has less effect on the pressure loss, but moisture content in the steam has a major impact on the pressure loss.
作者
贺惠民
张晓毅
HE Hui-min ZHANG Xiao-yi(State Grid Hebei North Energy Conservation Service Corporation, Beijing 100045, China)
出处
《汽轮机技术》
北大核心
2017年第1期43-46,共4页
Turbine Technology
关键词
核电汽轮机
中压阀门
流场
压力损失
数值模拟
nuclear steam turbine
mid-pressure valve
flow field
pressure loss
numerical simulation
