CAJ | 학술논문

采用离散元方法(DEM)研究了粗颗粒的混入对移动床中空腔的抑制效应.结果表明,向移动床中混入粗颗粒能够抑制空腔的形成,尤其是在粗颗粒的壁面摩擦系数较小的情况下.为了进一步强化混入的粗颗粒对空腔的抑制效应,在粗颗粒与细颗粒的壁面摩擦系数相同时,应将粗颗粒分散在床层中,而对于粗颗粒壁面摩擦系数远小于细颗粒壁面摩擦系数的情况,应将其集中在壁面附近.
채용리산원방법(DEM)연구료조과립적혼입대이동상중공강적억제효응.결과표명,향이동상중혼입조과립능구억제공강적형성,우기시재조과립적벽면마찰계수교소적정황하.위료진일보강화혼입적조과립대공강적억제효응,재조과립여세과립적벽면마찰계수상동시,응장조과립분산재상층중,이대우조과립벽면마찰계수원소우세과립벽면마찰계수적정황,응장기집중재벽면부근.
Inhibiting cavity formation by mixing coarse particles into a moving bed was investigated by the discrete element method. The results indicated that coarse particles contributed to inhibiting the cavity formation in a moving bed, especially when the wall friction coefficients of coarse particles were lower than those of fine particles. To enhance the effect of coarse particles on cavity formation in the moving bed, the coarse particles should be dispersed in the bed when the wall friction coefficients of coarse particles were the same as those of fine particles, but should be concentrated at wall when the wall friction coefficients of coarse particles were significantly smaller than those of fine particles.