大型燃气-蒸汽联合循环机组余热锅炉烟气阻力的模拟研究  

Numerical Investigation on Gas Resistance of HRSG for Large Combined Gas-steam Cycle Unit

作　　者：朱宪然 王伟 ZHU Xian-ran;WANG Wei

机构地区：[1]中国大唐集团科学技术研究院有限公司火力发电技术研究院 [2]国网技术学院

出　　处：《电站系统工程》2018年第4期13-15,共3页Power System Engineering

摘　　要：利用数值模拟方法分别对一台大型余热锅炉的入口和出口过渡段内烟气流场进行了研究,由于过渡段尺寸变化较大,导致不同截面上烟气流速变化较大,从而使得不同截面上的静压和动压分布都有明显差别。模拟结果显示,由于余热锅炉入口处烟气温度高,故烟气流速较高且入口处结构尺寸上的变化对烟气阻力的影响更大。在测量余热锅炉烟气阻力时,可将燃气轮机排气口横截面和烟囱横截面代替余热锅炉本体的入口和出口截面,且可只按两个截面上的静压值进行测量和计算。The flow fields in the inlet and outlet transition sections are simulated to analyze the gas resistance of the HRSG for a large combined gas-steam cycle unit. Because of the great variation of sizes of transition sections, the velocities very significantly at different positions, and the distributions of static pressure and total pressure are different obviously. The simulations show that the inlet transition section could make more influence on the gas resistance for the higher gas temperature and higher gas velocity. The measurements can be made on the intersecting surfaces of gas-turbine outlet and stack duct instead of the inlet and outlet intersecting surfaces of HRSG. And only the static pressure could be measured to calculate the gas resistance of HRSG.

关 键 词：余热锅炉 燃气蒸汽联合循环 数值模拟 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]