摘要：基于欧拉-拉格朗日模型,对催化裂化烟气轮机内部气固流动特性进行数值研究;采用可压缩流体的k-ε双方程湍流模型,分析2种入口烟气流量对催化裂化烟气轮机内部流场及颗粒运动的影响。结果表明,随着流量的增大,静叶流道内静压、静温、分子黏度、动叶出口截面的气流速度有增大的趋势,颗粒的运动轨迹呈现向动叶叶片靠近的趋势,颗粒浓度在叶片上的分布呈增大的趋势,颗粒沉积速率较大的区域范围呈扩大的趋势。

关键词：催化裂化；烟气轮机；气-固两相流；烟气流量；数值模拟

Abstract : The gas -solid two - phase flow characteristics in the fluid catalytic cracking gas turbine were simulated based on Euler -Lagrange model. The standard k -ε turbulence model of compressible gas was adopted. The effect of 2 different inlet gas flow rates on the fluid catalytic cracking gas turbine internal flow field and particle motion was analyzed. The results show that with the increase of flow rate， the static pressure， static temperature， molecular viscosity in blade runner and the air speed of blade outlet section tend to increase. The trajectory of the particles is inclined to move towards to the blade. The discrete phase model concentration on the blade occurs to increase. The area with the high deposition rate of the discrete phase model expands. 

Keywords： fluid catalytic cracking； flue gas turbine； gas-solid two-phase flow； gas flow rate； numerical simulation