腐蚀
流化床
流化床燃烧
流量(数学)
材料科学
机械
粒子(生态学)
环境科学
地质学
地貌学
物理
热力学
海洋学
作者
Ruiqi Bai,Tuo Zhou,Man Zhang,S. Sherry Zhu,Hairui Yang
标识
DOI:10.1016/j.powtec.2023.118830
摘要
In this paper, the erosion characteristics in a circulating fluidized bed (CFB) were investigated on time scale with Euler-Lagrange model based computational particle fluid dynamics (CPFD). By analyzing average erosion rate data, two different erosion characteristics were found. In addition to the common linear erosion caused by downflow particles, another type of erosion is characterized by step growth and is caused by upwelling particles. Linear erosion at the height of 0.1 m is close to that at 0.2 m from the air distributor, but the value of stepped erosion at 0.1 m is much greater than that at 0.2 m. The simulation results show that stepped erosion is the main cause of erosion in the simulated object, accounting for about 70% of the total erosion. The present numerical study implies that the special gas-solid flow of CFB will bring different characteristics of erosion, and the anti-wear method should be targeted at the causes of erosion.
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