大孔径高气速单孔气泡形成  

Bubble formation from large submerged single orifice at high gas velocity

作　　者：沈雪松[1] 沈春银[1] 李光[1] 戴干策[1] 

机构地区：[1]华东理工大学联合化学反应工程研究所,上海200237

出　　处：《化工学报》2008年第9期2220-2225,共6页CIESC Journal

基　　金：上海市重大基础研究项目(05DJ14002)~~

摘　　要：The formation of bubbles generated in a bubble column with 190 mm I.D.from large orifices at high gas velocity was studied for air-deionized water system.The experiments were made with orifice diameters varying from 4 mm to 21 mm and hole gas velocity in the range of 0.8—154.8 m·s-1.The bubble shape and bubble size were recorded by CCD camera,critical hole gas velocity for bubble deformation was derived from the transition of aspect ratio of bubbles.The results showed that bubbles were spherical when hole gas velocity was lower than 20 m·s-1.When hole gas velocity was higher than 50 m·s-1,the shape of bubbles changed to elliptical.A correlation equation was established for bubble size as a function of hole gas velocity and orifice diameter,and the equation predicted the bubble size well for orifice diameter larger than 3 mm and hole gas velocity from 10 m·s-1 to 80 m·s-1 in air-deionized water system.The formation of bubbles generated in a bubble column with 190 mm I. D. from large orifices at high gas velocity was studied for air-deionized water system. The experiments were made with orifice diameters varying from 4 mm to 21 mm and hole gas velocity in the range of 0.8-154.8m ·s^-1. The bubble shape and bubble size were recorded by CCD camera, critical hole gas velocity for bubble deformation was derived from the transition of aspect ratio of bubbles. The results showed that bubbles were spherical when hole gas velocity was lower than 20m·s^-1. When hole gas velocity was higher than 50 m·s^-1, the shape of bubbles changed to elliptical. A correlation equation was established for bubble size as a function of hole gas velocity and orifice diameter, and the equation predicted the bubble size well for orifiee diameter larger than 3 mm and hole gas velocity from 10 m·s^-1 to 80 m·s^-1 in air-deionized water system.

关 键 词：气泡形成 气泡形态 大孔径 高气速 

分 类 号：TQ021.1[化学工程]