Effect of Elbow Structure on Gas-Solid Separation and Flow Field adjacent to the Exit of the Swirl Burner

摘要：

An elbow is often used as the solid-gas separator in coal-fired burners.In this paper,four different elbow structures are selected and their effects on the gas solid separation and flow field adjacent to the burner exit are numerically studied.The axial,circumferential velocity distributions,the particle trajectory and the secondary flow are presented and discussed.Based on the simulation results,the solid separation and particle concentration distributions in the radial direction and along circumference remarkably depended on the elbow structure.The secondary flow could be found near the elbow and it also depends on the elbow structure.By modifying the elbow structure,for example,using the guidance plate could improve the elbow performance.

关键词： swirl burner elbow gas-solid flow field particle concentration gas solid separation

作者: Bo Li Hai Zhang Yuxin Wu Kai Cui airui Yang Junfu Lu

作者单位: Key Laboratory for Thermal Science and Powder Engineering of Ministry of Education,Department of Thermal Engineering,Tsinghua University,Beijing 100084,China

会议类型: 国际会议

会议名称: The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)

会议地点: 哈尔滨

会议语种:英文

页码: 742-746

在线出版日期: 2011-07-19（万方平台首次上网日期，不代表论文的发表时间）