摘要
建立了1台热输入0.1 MW的加压喷动流化床煤部分气化炉和相同尺寸的冷态模型试验装置,通过试验和数值模拟方法分析了压力对喷动流化床流动特性的影响.数值模拟采用了非稳态欧拉多相流模型,研究结果表明：随着工作压力增大,床内的中心喷动区和环形区的空隙率均相应减小;颗粒在较高工作压力下的轴向速度大于较低压力工况下的速度值;在压力为0.1-0.3 MPa时,模拟工况的流动状态与试验结果相符.
A 0.1 MW thermal input pressurized spout-fluid bed gasifier was built up for part gasification of coal, and a cold model test device of the same size was also set up. The effect of pressure on flow characteristics of the spout-fluid bed was analyzed through experimental and numerical simulation methods. Unsteady Eulerian multi-phase flow model was adopted in numerical simulation. Results show that the interstice in the central spout region and annular region of the bed reduces with the increase of the working pressure. The axial velocity of the particle at high pressure is greater than that at low pressure, and the flow behavior of simulation accords with the test results in range of 0.1 -0.3 MPa.
出处
《动力工程》
CSCD
北大核心
2009年第9期831-836,共6页
Power Engineering
基金
国家重点基础研究发展计划(973计划)资助项目(G199902210535
2004CB217702)
南京工程学院基金资助项目(KXJ08018)
关键词
喷动流化床
欧拉多相流
压力
流动特性
数值模拟
spout-fluid bed
Eulerian multi-phase flow
pressure
flow characteristics
numerical simulation
