Modeling and numerical analysis of the effect of blade roughness on particle deposition in a flue gas turbine
Modeling and numerical analysis of the effect of blade roughness on particle deposition in a flue gas turbine
复制标题
DOI：
10.1016/j.powtec.2019.02.033
复制
发表时间：
2019-04
影响因子：
5.2
通讯作者：
Weiwei Xu;Konghao Zhu;Jianjun Wang;Lin Yajun;L. Qiang
中科院分区：
文献类型：
--
作者：
Weiwei Xu;Konghao Zhu;Jianjun Wang;Lin Yajun;L. Qiang
颗粒沉积在烟气轮机中非常常见。为了计算颗粒沉积，考虑了叶片粗糙度对气流和颗粒的影响，对颗粒沉积进行了建模和计算研究。数值计算结果与实验结果吻合较好。通过数值模拟研究了粗糙度对烟气涡轮机内沉积的影响。结果表明，叶片表面沉积的颗粒主要为小于10 μm的颗粒，大于10 μm的颗粒不易沉积在叶片表面。随着叶片粗糙度的增加，催化剂在叶片上的沉积质量增加;叶片包括转子叶片、定子叶片和叶尖。当叶片粗糙度>300 μm时，叶片粗糙度对颗粒沉积的影响不明显。通过实验验证了叶片表面粗糙度对颗粒沉积的影响。即使当气体温度从300 °C变化到700 °C并且颗粒浓度从100 g/m3变化到400 g/m3时，所有实验结果都表明，降低表面粗糙度是减少烟气涡轮机中颗粒沉积的有效方法。
Particle deposition is very common in flue gas turbines. To calculate particle deposition, considering the effects of blade roughness on gas flow and particles, a modeling and computational study on particle deposition is presented. The numerical results are in good agreement with the experimental results. The effect of roughness on deposition in the flue gas turbine was investigated numerically. The results show that most of the deposited particles are <10 μm in size and that particles larger than 10 μm are not easily deposited on the blade. With increasing blade roughness, the deposition mass of the catalyst on the blade increases; the blades include a rotor blade, stator blade and blade tip. When the blade roughness is >300 μm, the effect of blade roughness on particle deposition is not obvious. The effect of blade surface roughness on particle deposition is also verified through experimentation. Even when the gas temperature was varied from 300 to 700 °C and the particle concentration varied from 100 to 400 g/m3, all the experimental results show that the reduction in surface roughness is an effective method to reduce particle deposition in a flue gas turbine.