超临界CO2中颗粒物运动沉积特性研究

he simulation of ANSYS Fluent software is used to predict the particle motion deposition in the channel with κ-ε model, and the laws of motion deposition characteristics of particles with different particle sizes (2~10 μm) in supercritical CO2 in the pipe are obtained. The results show that: the particle deposition rate increases and then decreases with the increase of heat flow density for a certain pipe diameter and length, and the peak of particle deposition appears earlier; Study on movement and deposition characteristics of particles in supercritical CO2increasing the flow velocity can reduce the particle deposition, but when the velocity is larger than 2 m/s, the effect of flow velocity on particle deposition decreases significantly; increasing the particle size can make the peak of particle deposition concentration move along the inlet.