STUDY ON NUMERICAL DIFFUSION IN NUMERICAL SIMULATION OF FLOW CHARACTERISTIC IN COMPLICATED TANGENTIALLY FIRED BOILER

摘要：

The effect of offset angles of mid-secondary air nozzles on gas flow field in tangentially fired boiler with the FLUENT package was numerically studied and the effect of numerical diffusion near the burner areas on gas flow field in the furnace was investigated. To reduce the influence of numerical diffusion, some measures were taken by evaluating the nature of numerical diffusion, such as changing the type of grid, the grid size and the order of the discretization scheme. Compared with experimental data, an appropriate method was adopted to solve the numerical diffusion. It can provide research basis of air-dynamic field of tangentially fired boiler.

关键词： Numerical simulation Numerical diffusion Discretization scheme Mid-secondary air

作者: Shaozeng SUN Huali CAO Zhiqiang WANG Xiaohui ZHANG Rui SUN Ze ZHANG Yukun QIN

作者单位: Institute of Combustion Engineering, Harbin Institute of Technology,Harbin,China

会议类型: 国际会议

会议名称: 第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)

会议地点: 武汉

会议语种:英文

页码: 700-704

在线出版日期: 2007-12-01（万方平台首次上网日期，不代表论文的发表时间）