PRESSURE FLUCTUATIONS IN TURBULENT FLUIDIZED BEDS

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

SANG D. KIM¹  GEUN S. LEE¹ 

[1] Department of Chemical Engineering, Korea Advanced Institute of Science and Technology

关键词: Pressure Fluctuations;    Turbulent Fluidized Bed;    Statistical Analysis;    Fluctuation Intervals;   

DOI  :  10.1252/jcej.21.515

来源: Maruzen Company Ltd

【 摘 要 】

References(35)Cited-By(66)From the statistical analysis of pressure fluctuations, the hydrodynamic properties in a turbulent fluidized bed of glass beads (dp: 0.362mm) have been determined in a 0.1m-ID × 3m high Plexiglas column. The statistical properties such as mean amplitude, fluctuation interval, standard deviation, skewness and flatness of pressure fluctuations have been utilized to determine the transition velocity from the bubbling to turbulent flow regimes in a fluidized bed. The obtained transition velocities from these methods were found to have very similar values. In the turbulent flow regime, the mean amplitude, fluctuation interval, standard deviation and flatness of pressure fluctuations decreased with an increase in gas velocity. By contrast, the skewness of pressure fluctuations increased with gas velocity. The data of the present and previous studies on transition velocity from bubbling to turbulent flow regimes in terms of Reynolds number have been correlated with Archimedes number.

【 授权许可】

Unknown