火烧炉内气相燃烧过程的三维数值模拟

Three-dimensional numerical simulation of gaseous combustion process in fire furnace

本文对某工业火烧炉内的三维湍流气相燃烧场特性进行了数值模拟,湍流模型采用可实现k-ε双方程模型,湍流燃烧采用有限速率/涡耗散模型,辐射换热采用P1模型,数值方法采用SIMPLE算法,实现了炉内火烧试验的数值再现,特别考察了入口压力、燃料/空气比、多烧嘴不同组合工况等因素对炉内温度场和流场的影响,并对该火烧炉的运行提出了一些合理化建议,为其实际运行提供了有益的参考。

In this paper, the three-dimensional gaseous combustion process in fire furnace is simulated. The fire characteristics in furnace are showed by numerical simulation applying the realizable k-ε model to calculate the turbulent reacting flow, the finite-rate/eddy-dissipation model to study turbulent combustion, and P1 model to simulate radiation heat transfer. Especially, the effects of inlet pressure, fuel-to-air ratio, and combined conditions of the burners on temperature and velocity field are investigated. On the base of these results, some advice for the operation are given, which supply useful reference for the practice of the fire furnace.