增压锅炉烟气发生器燃烧流场与污染排放数值分析  

Numerical simulation of combustion flow and NOx emissions in gas generator of supercharged boiler

作　　者：穆勇[1] 郑洪涛[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《机械设计与制造》2010年第3期190-192,共3页Machinery Design & Manufacture

摘　　要：为了考察设计方案中增压锅炉烟气发生器的阻力大小及流场条件能否满足系统设计要求,采用FLUENT程序,对增压锅炉烟气发生器设计结构方案的燃烧流场及阻力进行了数值分析,同时考察了发生器的污染物排放性能。数值模拟时采用了RNGk-ε湍流模型、P-1辐射模型、液体燃料喷雾燃烧过程的颗粒轨道模型和PDF燃烧模型,对设计方案的压力场、温度场及NOx排放进行分析,得到了设计方案的阻力特性、温度分布和排污特性。结论表明:该方案的阻力大小及出口温度能够满足设计要求。该工作为优化烟气发生器结构和污染控制具有重要的指导意义。In order to verify the resistance and the temperature of flow to meet the project,this paper adopted FLUENT programme to analyze the fluid structure of a combustion chamber and NOx emissions in gas generator of supercharged boiler. With RNG k-ε turbulent model,P-1 radiation model,discrete phase madelingfor liquid fuel and PDF combustion model,the pressure ,temperature and NOx emissions were analyzed in the combustion chamber. A nd parameters ,such as resistance ,the distribution of temperature and the quantity of NOx emissions ,were acquired. The results showed that the quality of resistance and temperature of outlet meet the project. This is a significative work to optimize the structure and reduce the emissions.

关 键 词：增压锅炉 燃烧 湍流 数值模拟 NOx 

分 类 号：TH16[机械工程—机械制造及自动化] TK472[动力工程及工程热物理—动力机械及工程]