• TRANSPORT PHENOMENA & FLUID MECHANICS • Next Articles
SUN Shulan; BAO Xiaojun; WEI Weisheng
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孙淑兰; 鲍晓军; 魏伟胜
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Abstract: In a spouted bed of 80mm in ID and 1700mm in height, the gas residence time distributions at different radial positions in both spout and annular area were measured with five different kinds of particles as spouting material, air as spouting gas, and hydrogen as tracer. The effects of superficial gas velocity, operating pressure, particle size and its category on gas residence time distribution were discussed. It was found that the gas velocity profilein spout was more uniform than that in annulus. It could be concluded that the gas flow in the spout could be treated as a plug-flow, while that in the annulus inhibited a strong non-ideal flow behavior. Increasing the superficial gas velocity and decreasing the operating pressure, the particle density and its size gave rise to spouting disturbance, thus the measured tracer concentrations vs. time curves fluctuated. The variances of residence time distribution curves could be taken as a measure of the gas luctuation degree.
Key words: residence time distribution, spouted bed
摘要: In a spouted bed of 80mm in ID and 1700mm in height, the gas residence time distributions at different radial positions in both spout and annular area were measured with five different kinds of particles as spouting material, air as spouting gas, and hydrogen as tracer. The effects of superficial gas velocity, operating pressure, particle size and its category on gas residence time distribution were discussed. It was found that the gas velocity profilein spout was more uniform than that in annulus. It could be concluded that the gas flow in the spout could be treated as a plug-flow, while that in the annulus inhibited a strong non-ideal flow behavior. Increasing the superficial gas velocity and decreasing the operating pressure, the particle density and its size gave rise to spouting disturbance, thus the measured tracer concentrations vs. time curves fluctuated. The variances of residence time distribution curves could be taken as a measure of the gas luctuation degree.
关键词: residence time distribution;spouted bed
SUN Shulan, BAO Xiaojun, WEI Weisheng. Gas Residence Time Distributions in a Spouted Bed [J]. .
孙淑兰, 鲍晓军, 魏伟胜. 喷动床中气体停留时间分布的研究[J]. CIESC Journal.
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