PROPAGATION CHARACTERISTICS OF PRESSURE DISTURBANCES ORIGINATED BY GAS JETS IN FLUIDIZED-BEDS

被引：19

作者：

MUSMARRA, D

VACCARO, S

FILLA, M

MASSIMILLA, L

机构：

[1] CNR,IST RIC COMBUST,I-80125 NAPLES,ITALY

[2] NAPLES UNIV,DIPARTIMENTO CHIM,I-80134 NAPLES,ITALY

[3] UNIV PADUA,IST CHIM IND,I-35131 PADUA,ITALY

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 1992年 / 18卷 / 06期

关键词：

FLUIDIZATION; GAS JETS; PRESSURE FLUCTUATIONS; DYNAMIC WAVES;

D O I：

10.1016/0301-9322(92)90070-W

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An experimental investigation has been carried out on velocities and amplitudes of pressure disturbances in fluidized beds made of 100-200 mum glass ballotini. Disturbances were originated by gas jetting in a 0.35 m i.d. fluidized bed. A fluidization tube 0. 10 m i.d. has also been used. Different types of disturbances have been induced in the bed contained in this tube: injection of a freely rising bubble and of a captive bubble; injection of a bubble chain; and compression of the bed free surface. The dynamic wave character of the disturbances has been shown. Velocities and amplitudes of waves moving through the beds have been measured. In particular, wave velocities have been compared with theoretical results obtained by the application of ''pseudo-homogeneous'' and ''separated phase flow'' models.

引用

页码：965 / 976

页数：12

共 18 条

[1] A NEW THEORY OF THE INSTABILITY OF A UNIFORM FLUIDIZED-BED [J].