摘要
针对烟气轮机叶片严重结垢的问题,总结了颗粒与光滑壁面和粗糙壁面的碰撞模型研究进展、颗粒的沉积模型。并根据烟机的结垢过程,将催化剂颗粒与烟机叶片的碰撞分为3种情况,即颗粒与有涂层壁面的碰撞、颗粒与质点壁碰撞、颗粒与结垢壁面碰撞。通过对这些模型的总结发现:当颗粒与粗糙壁面碰撞时,正弦模型将粗糙度看作均匀分布,虚拟壁模型只适用于入射角小于7°的情况,将粗糙度角按照正态分布处理,结果最为理想;对于颗粒与烟机叶片的碰撞中,前2种碰撞可以找到合适的碰撞模型,颗粒与结垢壁面的碰撞仍有待深入研究。
Aiming at the problem of serious fouling in the flue gas turbine blades, the collision model of particles with smooth wall and rough wall, the deposition model of particles were summarized. According to the fouling process of flue gas turbine, the collisions between the catalyst particles and the blades were summarized into three cases： the collision between the particles and the coating wall, the collision between the particles and the particle wall, and the collision between the particles and the scale wall. Through the summary of these models can be found that when the particles collide with the rough wall, the sinusoidal model regards roughness as a uniform distribution, The virtual wall model is only applicable to the case where the incidence angle is less than 7° , when the roughness angle is treated by normal distribution, the result is the best. For the collision between particles and flue gas turbine blades, the first two kinds of collisions can find a suitable collision model, the collision between the particles and the fouling wall is still to be further studied.
出处
《中国粉体技术》
CSCD
北大核心
2017年第2期12-19,共8页
China Powder Science and Technology
基金
山东省自然科学基金项目
编号:ZR2015EM026
关键词
烟气轮机
催化剂
颗粒碰撞
粗糙度
沉积
flue gas turbine
catalyst
particle collision
roughness
adhesion
