江苏大学学报（自然科学版）2018，Vol.39Issue(1)：32-37,6.DOI:10.3969/j.issn.1671-7775.2018.01.006
烟气横掠螺旋槽管束灰粒沉积特性的数值模拟
Numerical simulation on particle deposition in flue gas flowing across spirally corrugated tubes in aligned arrangement
摘要
Abstract
To investigate the particle deposition in flue gas on the surface of spirally corrugated tubes , the numerical simulation was carried out by discrete phase model and user-defined function of particles deposition model to predict gas-solid two phase flow across spirally corrugated tubes . The particle deposition rate and the difference between bare tubes and spirally corrugated tubes were analyzed and discussed .The effects of gas-solid two phase flow parameters and tube bundles configuration on the particle deposition rate were also investigated .The results show that compared to the bare tubes , the deposition rate for spirally corrugated tubes is decreased by about 5%when the gas flow velocity is in the range from 7 to 10 m· s-1 .However, when the flue gas flow velocity is beyond 10 m· s-1 , there is no obvious difference between spirally corrugated tubes and bare tubes .The deposition rate is increased with the increasing of particle diameter and particle concentration in flue gas . The deposition rate is proportional to longitudinal space and inversely proportional to transverse space , pitch and groove depth . The effects of transverse space and pitch on the particles deposition rate are more obvious than that of groove depth .关键词
螺旋槽管束/气固两相流/灰粒沉积/离散相模型/数值模拟Key words
spirally corrugated tubes/gas-solid two phase flow/particle deposition/discrete phase model/numerical simulation分类
能源科技引用本文复制引用
王迎慧,盛林弘毅,归柯庭,施明恒..烟气横掠螺旋槽管束灰粒沉积特性的数值模拟[J].江苏大学学报（自然科学版）,2018,39(1):32-37,6.基金项目
国家自然科学基金资助项目(51276039) （51276039）
