二次再热锅炉尾部三烟道流量分配的数值模拟

Numerical Simulation of Flow Distribution of Three Flues of a Double Reheat Boiler

使用数值模拟技术对二次再热锅炉尾部三烟道流量分配进行了研究,分析其流场、压力场分布,并对典型工况下的流量分配和挡板阻力特性进行计算。研究发现通过数值模拟试验可以有效模拟二次再热锅炉尾部三烟道内的流场和压力场分布情况,得到流量分布和挡板压力特性关系。研究发现挡板对三烟道内流量分布具有一定的调节作用;在本模拟设置的调节范围内,单一烟道内流量的调节范围可以从14%调节至60%。

Numerical simulation technology is used to study the flow distribution of the three flues at the rear of the double reheat boiler,analyzes its flow field and pressure field distribution,and resistance characteristics of gas dampers under typical working conditions.The study found that the numerical simulation test can effectively simulate the flow field and pressure field distribution in the three flues at the tail of the double reheat boiler.The study found that the gas dampers has a certain adjustment effect on the flow distribution in flues;within the adjustment range set by this simulation,the adjustment range of the flow in a single flue can be adjusted from 14%to 60%.