摘要
为研究炉内烟气非线性流动的初值依赖特性问题,从具有对称结构的塔式四角切圆锅炉中抽象出一个几何结构和边界条件完全对称的三维简化锅炉模型,采用数值模拟研究了同时启动、对角启动和顺序启动3种启动方式对炉内流场、温度场及炉膛出口处热偏差的影响,并分析了各截面的速度场、温度场、速度分布不均匀系数和温度偏差系数。结果表明:相较于传统的四角同时启动方式,采用顺序启动和对角启动方式能够改善炉内烟气流场和温度场的偏斜情况,并能有效减小炉膛出口处的热偏差。
To study the characteristics of the nonlinear flow gas in the furnace depended on the initial value,a simplified three-dimensional boiler model with completely symmetrical geometry and boundary conditions was abstracted from a tower tangentially fired boiler with symmetrical structure.Choosing three kinds of startup modes for simultaneous startup,diagonal startup and sequential startup,the influence of startup modes on the flow field,temperature field in the furnace and the thermal deviation at the furnace exit was numerically simulated.The velocity field,temperature field,uneven coefficient of velocity distribution and temperature deviation coefficient of each section were analyzed.Results show that compared with the traditional simultaneous startup mode,the control strategies of sequential startup and diagonal startup can improve the deviation of the gas flow field and temperature field in the furnace,and effectively reduce the thermal deviation at the furnace exit.
作者
赵晏锋
杨茉
王文帅
ZHAO Yanfeng;YANG Mo;WANG Wenshuai(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Jian Qiao University,Shanghai 201306,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2022年第7期612-621,共10页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51736007)。
关键词
切圆燃烧
非线性特性
初值依赖
启动方式
热偏差
tangentially fired
nonlinear characteristic
dependence on initial value
startup mode
thermal deviation
