应用数学和力学2026，Vol.47Issue(8)：1035-1044,10.DOI:10.21656/1000-0887.460177
循环流化床锅炉水冷壁热应力影响因素分析
Influencing Factors on the Water-Cooled Wall Thermal Stress in CFB Boilers
摘要
Abstract
The in-service supercritical circulating fluidized bed boiler was investigated.Based on actual opera-tional data,a numerical simulation model for the temperature field and the stress field was established.The effects of boundary conditions,including the external heat flux density of the tube wall and the convective heat transfer coefficient,on the maximum wall temperature and maximum thermal stress of the water-wall tube,were discussed.In addition,the influences of structural parameters,such as the fin thickness and the tube pitch,on the maximum temperature difference and maximum thermal stress between adjacent water-wall tubes,were analyzed.The simulation results indicate that,under a constant convective heat transfer coeffi-cient,both the maximum wall temperature and the maximum thermal stress of the water-wall tube will increase with the external heat flux density.Conversely,when the external heat flux density is kept constant,the maxi-mum wall temperature and maximum thermal stress will decrease as the convective heat transfer coefficient be-tween the tube wall and the working medium increases.Notably,when the convective heat transfer coefficient decreases to 0.5 kW/((m2·K),the maximum thermal stress will increase sharply.Furthermore,the maximum temperature difference and maximum thermal stress between adjacent water-wall tubes will increase with the decrease of the fin thickness,but increase with the tube pitch.Specifically,when the fin thickness is reduced by 2 mm,the maximum temperature difference between adjacent water-wall tubes will increase by approxi-mately 5℃,accompanied by an increase in the maximum thermal stress from 213 MPa to 219 MPa.When the tube pitch increases by 2 mm,the maximum temperature difference will rise by about 7℃,and the correspond-ing maximum thermal stress will rise from 213.8 MPa to 215.1 MPa.关键词
循环流化床锅炉/水冷壁/数值模拟/壁温/热应力Key words
circulating fluidized bed boiler/water-cooled wall/numerical simulation/wall temperature/ther-mal stress分类
数理科学引用本文复制引用
高义斌,左琪,张浩,樊尊硕,李勇,徐婧..循环流化床锅炉水冷壁热应力影响因素分析[J].应用数学和力学,2026,47(8):1035-1044,10.基金项目
国网山西省电力公司科技项目(520530250004) （520530250004）
