科研之友
微信
新浪微博
Facebook
分享链接
摘要
Functional analysis of mass balances in a cocurrent packed-bed column has been carried in conjunction with analysis of the locally linear relationship between liquid holdup and phase velocities and first-order kinetics of the rate of holdup formation. The analysis indicates that the stability of the hydrodynamic regime in the bed is limited by the condition k(lambda - gamma)L < 2. Furthermore, for k(lambda - gamma)L > 0.5, the amplitude of the pulsations appearing in the bed in response to small flow perturbations was found to amplify. For k(lambda - gamma)L approaching 2, the flow disturbances are amplified very strongly. Experimental measurement of the liquid holdup, analysis of the kinetics of liquid holdup formation, and determination of the limits of the appearance of natural pulsations from pressure drop fluctuations show that the limit of inception of natural pulsations closely adheres to the line k(lambda - gamma)L = 2 where our analysis predicts very strong amplification of flow disturbances.
- 出版日期2008-10-1
