Numerical analysis of catalyst particle deposition characteristics in a flue gas turbine with an improved particle motion and deposition model

被引:1
|
作者
Cai, Liuxi [1 ]
Yao, Jiawei [1 ]
Hou, Yanfang [1 ]
Wang, Shunsen [2 ]
Li, Yun [1 ,3 ]
Feng, Zhenping [2 ]
机构
[1] Xi An Jiao Tong Univ, Inst Chem Machinery, Xian, Peoples R China
[2] Xi An Jiao Tong Univ, Inst Turbomachinery, Xian, Peoples R China
[3] Xi An Jiao Tong Univ, 28 West Xianning Rd, Xian 710049, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Flue gas turbine; catalyst particles; discrete random walk model; deposition model; Stokes number; flue gas expansion ratio; TURBULENT; SIMULATION; ADHESION; FLOW; WALL;
D O I
10.1177/09576509231188183
中图分类号
O414.1 [热力学];
学科分类号
摘要
To more accurately understand and predict the deposition behavior of catalyst particles in the flue gas turbine cascade, test and numerical combined study is performed in this paper. Based on the systematic analysis of the deposition process and physical mechanism of the catalyst particles, the traditional DRW model, critical velocity particle deposition model and removal model were corrected with the user defined function custom function and validated with the actual deposition morphology. On this basis, the effects of the particle Stokes number and flue gas parameters on the particle deposition characteristics of the flue gas turbine cascade were detailed investigated. The results show that the revised DRW model, critical velocity and removal model can more accurately predict the deposition location and deposition rate of particles in the turbine cascade. With the increase in the Stokes number of particles, the average particle impact rate on the blade surface gradually increased, while the average deposition rate showed a trend of first increasing and then decreasing. The average deposition rate of particles in the rotor blade surface is roughly twice as high as that in the stator surface. With the increase of the flue gas expansion ratio, the deposition rate of particles less than 3 & mu;m gradually increases, while the deposition rate of particles greater than 3 & mu;m tends to decrease. In addition, the change in the flue gas expansion ratio has no obvious effect on the particle deposition distribution in different size ranges.
引用
收藏
页码:1790 / 1807
页数:18
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