空气动力学学报2001，Vol.19Issue(1)：30-38,9.
用双流体-轨道模型模拟四角喷燃模型炉内三维湍流两相流动和煤粉燃烧
Simulation of 3-D gas-particle flows andcoal combustion in a tangentially-fired furnace modelusing a two-fluid -traje ctory model
摘要
Abstract
Most of investig ators use Eulerian gas-phase model and particletrajectory model (Eulerian-Lag rangian) to simulate coal combustion in boiler furnaces. In this paper, a two-fluid-tra jectory (continuum-trajectory, CT) model (Eulerian-Eulerian-Lagrangian) is used for simulating turbulent reacting gas-particle flows and coal combustion in a tangentially fired furnace. It is based on Eulerian gas-phase equations, Eule rian particle-phase continuity and momentum equations and Lagrangian equations of particle temperature and mass change, with submodels of k-ε-kp two-ph ase turbulence model, EBU-Arrhenius turbulent combustion model, DO(discrete-ordina tes) radiation model, coal moisture evaporation,devolatilization and char combu stion models with simultaneous three reactions. To reduce the numerical diffusion caused by non-orthogonal crossing of the burner jets with the grid lines, acoordinate system rotated with an angle is adopted. To validate the two-phase fl ow models, an experimental study of the gas-particle flow field in a cold model of tangentially fired furnace was carried out using PDPA measurements, which gi ves the two-phase velocities, turbulence intensities and particle concentration .The comparison of cold two-phase flow predictions with measurements shows that the mean flow field is plausibly predicted. The 3-D coal combustion predictions give the hot-flow field, coal concentration distribution, the gas temperature, species concentration, and heat fluxes on the walls. The results show asymmet ric temperature distribution and a local high temperature zone near a sidewall at the furnace exit.关键词
双流体-轨道模型/湍流两相流动/煤粉燃烧/四角喷燃炉分类
数理科学引用本文复制引用
李力,周力行,李荣先,张健..用双流体-轨道模型模拟四角喷燃模型炉内三维湍流两相流动和煤粉燃烧[J].空气动力学学报,2001,19(1):30-38,9.基金项目
国家重点基础研究专项经费资助项目；哈尔滨锅炉责任有限公司合 作项目. （）
