화학공학소재연구정보센터
AIChE Journal, Vol.66, No.2, 2020
Experimental study of the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms
This work investigated the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms. Results showed that the pressure drop increased first and then decreased with the increasing inclination angle at the same mass flux and superficial gas velocity. The changing trend of minimum conveying velocity (u(min)) and the pressure drop near it can be divided into two types by taking 45 degrees as the boundary, which was consistent with the difference in flow regimes near u(min) at different inclination angles based on results of high-speed photography and acoustic emission detection. Furthermore, the pressure drop was decomposed to investigate the underlying mechanism of the changing trend of u(min). Results showed that the changing trend of u(min) was closely related to the particle velocity and the particle velocity obtained by high-speed photography was in good agreement with the theoretical analysis.