600MW机组凝汽器喉部加装挡板数值模拟  

Numerical Simulation on Condenser Throat Installing Baffles in 600MW Unit

作　　者：周兰欣[1] 李姗[1] 刘康[1] 

机构地区：[1]电站设备状态检测与控制教育部重点实验室(华北电力大学),保定071003

出　　处：《汽轮机技术》2016年第4期257-259,共3页Turbine Technology

摘　　要：以某600MW机组为例,在考虑内置低压加热器和小汽轮机排汽等附加流体情况下,采用FLUENT软件对凝汽器喉部流场进行数值模拟,提出了在7号、8号低压加热器顶部加装挡板的方法。计算结果表明:凝汽器喉部出口蒸汽流动均匀性系数最高提高了4.1%,平均汽阻减小了9.4Pa,改善了凝汽器内的流场分布,提高了凝汽器换热效果。Considering low pressure heater and additional fluid such as inner small turbine exhaust steam in a 600 MW unit, the internal flow field of condenser throat is investigated by using the FLUENT software, and a method of installing baffles on the top of low pressure heater No. 7 and 8 is proposed to improve the internal flow field. The calculation results shows that： after the installation of baffles, the steam flow uniformity coefficient of condenser throat outlet increased by 4.1%, the average steam resistance reduced 9.4Pa, then the flow field distribution of the condenser becomes better, and the heat transfer effect of the condenser is improved.

关 键 词：凝汽器喉部 平均汽阻 均匀性系数 数值模拟 

分 类 号：TK264[动力工程及工程热物理—动力机械及工程]