摘要
针对旋流式催化裂化进料喷嘴进行了实验研究和数值模拟。实验中测量了不同工况下的雾化粒径和喷嘴的雾化角，同时验证了各段的压降分配方案。通过VOF（ volume of fluid）方法对喷嘴气液两相流的流动过程进行了数值模拟，描述了喷嘴中两相流的填充过程，得到了喷嘴的压力、速度分布和雾化角，并与实验结果进行了比较，二者吻合较好。对上述结果分析后表明，该型旋流式喷嘴雾化粒径在5360μm，雾化角随气液比或流量的增大而有所增加，采用内外嵌套式旋流器可使射流厚度较为均匀。
Experiments on and numerical simulation of a swirl fluid catalytic cracking （ FCC ） feed nozzle were presented. In the experiments, the spray angle and sauter mean droplet （ SMD） were measured at different flow rates. Then pressure drop on each section of nozzle was verified. Volume of Fluid （ VOF） method was used to simulate the gasliquid flow process in a swirl FCC feed nozzle. The simulation exhibited the process of twophase flow filling feed nozzle. The nozzle pressure, velocity distribution and spray angle were calculated;the calculated results agreed well with validated by experimental data. The results show that： the SMD size of feed nozzle is 5360μm;the spray angle increases with increasing gas/liquid mass ratio or flow rate;the spray pattern is fairly evenly distributed within combined cyclone.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2015年第3期388-394,共7页
Journal of Northwestern Polytechnical University
关键词
催化裂化
喷嘴
流场
两相流
雾化粒径
VOF方法
calculations, catalytic cracking, nozzles, flow tields, two phase flow, ilow velocity, design oI experi-ments, computer simulation, mathematical models, mesh generation, pressure drop, velocity distri-bution, FCC （ fluid catalytic cracking）, SMD （ sauter mean droplet）, VOF （ volume of fluid）
