CAJ | 학술논문

采用商业软件Fluent 6．3．26中的双流体模型研究了不同操作条件和颗粒物性对流化床内壁面磨损速率的影响.基于颗粒动力学理论(KTGF)对单层能量耗散(MED)磨损模型进行改进，并对比验证了改进模型的准确性.采用该模型研究了表观流速、固体负载量、颗粒粒径和密度等不同操作条件对壁面磨损速率的影响.结果表明：壁面磨损速率随着表观流速和固体负载量的增加而增大；在相同的操作条件下，粒径较小和质量较轻的颗粒磨损速率较快，发生磨损的区域面积也相对较大.
채용상업연건Fluent 6．3．26중적쌍류체모형연구료불동조작조건화과립물성대류화상내벽면마손속솔적영향.기우과립동역학이론(KTGF)대단층능량모산(MED)마손모형진행개진，병대비험증료개진모형적준학성.채용해모형연구료표관류속、고체부재량、과립립경화밀도등불동조작조건대벽면마손속솔적영향.결과표명：벽면마손속솔수착표관류속화고체부재량적증가이증대；재상동적조작조건하，립경교소화질량교경적과립마손속솔교쾌，발생마손적구역면적야상대교대.
The effects of operation conditions and particle properties on wall erosion rate in CFB boilers were investigated by using two-fluid model approach by the commercial software Fluent 6 . 3.26.The wall erosion rate was calculated by the improved monolayer energy dissipation (MED) erosion model which was modified by the kinetic theory of granular flow (KTGF).The simulated results were compared with the available experimental data and numerical findings in the litera-tures for model validation.Then the effects of operation parameters such as gas superficial veloci-ty,total bed inventory,particle diameter and density on the wall erosion rate were numerically studied.The results indicate that:the wall erosion rate increased with the fluidizing velocity and bed inventory;under the same operation conditions,smaller and lighter particles led to a higher e-rosion rate and more spacious erosion scope.