流体机械

2016, v.44;No.529(07) 9-13

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液体中气泡生成影响因素的试验研究
The Experimental Study on the Factors that Influence the Formation of Air Bubbles in the Liquid

丁跃文;张亚新;徐小姿;
DING Yue-wen;ZHANG Ya-xin;XU Xiao-zi;Xinjiang University;

摘要(Abstract):

为了提高浆态床反应器内的气含率,提高反应速率,利用高速摄影技术,研究了气泡在液体中形成的特性,在不同气孔内径、不同气体流量下分别考察了平面孔、内伸孔2种进气方式对气泡在水中生成的影响,测算了气泡脱离时的大小及生成所用时间;并考察了内伸孔高度、水温对气泡生成的影响。结果表明:相同试验条件下,生成气泡大小分别随着气孔内径、气体流量的增大而增大,内伸孔进气生成的气泡体积小,用时短,且与内伸孔的内伸高度有关;高温水中气泡生成用时较短,体积较小。
In order to improve the gas holdup and the reaction rate in slurry bed reactor,taking advantage of high-speed photography,the characteristics of how the air bubbles form in the liquid are studied. Under the different inside diameters of the pore and different gas-flow rates,this thesis investigates the impact that two kinds of air inlet mode-plane hole and internal-extension hole have on the formation of air bubbles in the water. The separated size and the time that is taken to form the bubbles are tested. It studies the impact that the height of internal-extension hole and water temperature have on the formation of air bubbles. The results show that under the same experiment condition,the size of formed air bubbles are larger when the inside diameter of the pore and gas-flow rate increase. Internal-extension hole forms air bubbles with small size and takes less time for formation,which is also related with the height of internal-extension hole. Air bubble gets formed with small size and takes less time in the high-temperature water.

关键词(KeyWords): 气泡;高速摄影;气液两相流;进气方式;温度
air bubble;high-speed photography;gas-liquid flow;air inlet mode;temperature;viscosity;surface tension

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作者(Author): 丁跃文;张亚新;徐小姿;
DING Yue-wen;ZHANG Ya-xin;XU Xiao-zi;Xinjiang University;

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