CAJ | 학술논문

本文采用Fluent软件对某裂解炉辐射段进行了数值模拟，计算中使用标准k-ε湍流模型、有限速率/涡耗散燃烧模型和离散坐标辐射模型，模拟结果与工厂数据一致。在此基础上，对辐射段进行了瞬态计算，模拟结果表明，烟气在炉膛中下段和炉顶拐角处形成回流，中下段回流有助于炉膛内对流换热，而炉顶拐角处回流使辐射段出现局部高温区；烟气循环有助于建立稳定的温度场；侧壁烧嘴使炉膛温度更为平均。本文模拟结果对裂解炉的设计和操作优化具有参考意义。
본문채용Fluent연건대모렬해로복사단진행료수치모의，계산중사용표준k-ε단류모형、유한속솔/와모산연소모형화리산좌표복사모형，모의결과여공엄수거일치。재차기출상，대복사단진행료순태계산，모의결과표명，연기재로당중하단화로정괴각처형성회류，중하단회류유조우로당내대류환열，이로정괴각처회류사복사단출현국부고온구；연기순배유조우건립은정적온도장；측벽소취사로당온도경위평균。본문모의결과대렬해로적설계화조작우화구유삼고의의。
Simulation for radiant section was carried out in an industrial tube cracking furnace with the computational fluid dynamics software Fluent. The standard k-εturbulence model, finite rate/eddy-dissipation combustion model and discrete ordinates radiation model were used to model the fluid flow, combustion and radiant heat transfer, respectively. The simulation result was good agreement with industrial data. Based on the steady simulation, the transient numerical calculation of the firebox was carried out. From the simulation results, the flue gas recirculation at the middle height is benefit for the heat convection, while the recirculation at the corner of the top of the firebox make a local high-temperature zone appear in the radiation section. The flue gas circulation helps to build a stable temperature field. The side burners make the temperature profiles more uniform. The results could be meaningful for the optimization of design and operation of the cracking furnace.