水平分布双气泡运动特性的可视化实验
|
摘要
为了研究双孔喷气工况下,孔径及孔间距对气泡的影响规律,通过可视化实验方法研究双孔壁面逸出气泡的运动特性,对不同孔径及孔间距情况下的两列气泡的运动轨迹、气泡脱离尺寸、气泡速度进行分析,并与单孔气泡生成及运动特性进行对比,得到孔口间距及孔口直径对气泡的影响规律。实验结果表明,当两列气泡并排上升时,两气泡之间距离并不会保持恒定,而是会出现相互靠近—远离—再靠近的循环震荡过程,且孔间距越小,气泡上升时所伴随的左右震荡的振幅越大;在孔径及气体流量均相同时,孔间距越小,脱离尺寸越小,气泡最终的稳定速度越小;当孔间距及气体流量均相同时,孔径越大,气泡的脱离尺寸越大,脱离尺寸与单孔情况的差值越大,气泡最终的稳定速度越大。
In order to study the effects of orifice diameter and separation distance on bubbles generated by twin-orifice, the motion characteristics of bubbles from the twin-orifice were studied by a visual experimental method. Bubble detaching size, velocity and trajectory under different apertures and distances between orifices were analyzed and compared with those of single orifice conditions. The results show that two bubbles oscillate during rising, and the distance between the two bubbles do not remain constant during approach-apart-approach movements. Furthermore, the amplitude of the oscillation increases with the decrease of separation distance. The bubble detaching size becomes smaller with less separation distances and the final stable bubble velocity is lower when studied under same pore diameter and flow rate. When the pore spacing and gas flow rate are the same, the bubble detaching size is bigger with bigger pore diameter, and the difference of detaching sizes between the twin-orifice and the single orifice becomes larger. The final stable velocity of the bubble is larger as well.
In order to study the effects of orifice diameter and separation distance on bubbles generated by twin-orifice, the motion characteristics of bubbles from the twin-orifice were studied by a visual experimental method. Bubble detaching size, velocity and trajectory under different apertures and distances between orifices were analyzed and compared with those of single orifice conditions. The results show that two bubbles oscillate during rising, and the distance between the two bubbles do not remain constant during approach-apart-approach movements. Furthermore, the amplitude of the oscillation increases with the decrease of separation distance. The bubble detaching size becomes smaller with less separation distances and the final stable bubble velocity is lower when studied under same pore diameter and flow rate. When the pore spacing and gas flow rate are the same, the bubble detaching size is bigger with bigger pore diameter, and the difference of detaching sizes between the twin-orifice and the single orifice becomes larger. The final stable velocity of the bubble is larger as well.
引文
[1]PAINMANAKUL P,LOUBIERE K,HEBRARD G,et al.Study of different membrane spargers used in waste water treatment:characterisation and performance[J].Chemical Engineering Process,2004,43(11):1347-1359.
[2]张志友,金良安,何升阳,等.气泡上浮运动与传热传质的耦合模型[J].高校化学工程学报,2018,32(2):358-367.ZHANG Z Y,JIN L A,HE S Y,et al.Study on coupling models for bubble floatation accompanied with heat and mass transfer[J].Journal of Chemical Engineering of Chinese Universities,2018,32(2):358-367.
[3]温宇,朱春英,付涛涛,等.不等宽T型分岔微通道内气泡的体积分配规律及关联[J].高校化学工程学报,2016,30(1):19-25.WEN Y,ZHU C Y,FU T T,et al.Volume distribution and correlation of bubbles in a microfluidic T-junction with unequal width bifurcations[J].Journal of Chemical Engineering of Chinese Universities,2016,30(1):19-25.
[4]LAU R,MO R,BEVERLY S W S.Bubble characteristics in shallow bubble column reactors[J].Chemical Engineering Research and Design,2010,88(2):197-203.
[5]RIBEIRO C P J R,LAGE P L C.Experimental study on bubble size distributions in a direct-contact evaporator[J].Brazilian Journal Chemical Engineering,2004,21(1):69-81.
[6]谢育博,刘道平,杨亮,等.蒸馏水和自来水中悬浮气泡表面天然气水合物生长特性的实验研究[J].化工进展,2017,36(1):129-135.XIE Y B,LIU D P,YANG L,et al.Experimental study on the growth characteristics of natural gas hydrate formation on suspended gas bubbles in distilled water and tap water[J].Chemical Industry and Engineering Progress,2017,36(1):129-135.
[7]李希,李兆奇,管小平,等.气液鼓泡塔流体力学研究进展[J].高校化学工程学报,2015,29(4):765-779.LI X,LI Z Q,GUAN X P,et al.Progress in hydrodynamics of gas-liquid bubble columns[J].Journal of Chemical Engineering of Chinese Universities,2015,29(4):765-779.
[8]周强,郭晓峰,李军,等.竖直上升气液泡状流数学模型封闭的研究[J].化工进展,2016,35(10):3049-3056.ZHOU Q,GUO X F,LI J,et al.Comparative investigation on closure models for the simulation of vertical gas-liquid bubbly upflow[J].Chemical Industry and Engineering Progress,2016,35(10):3049-3056.
[9]MULLER R L,PRINCE R G H.Regimes of bubbling and jetting from submerged orifices[J].Chemical Engineering Journal,1972,27(8):1583-1592.
[10]ALADJEM C T,SHEMER L,BARNEA D.On the interaction between two consecutive elongated bubbles in a vertical pipe[J].International Journal of Multiphase Flow,2000,26(12):1905-1923.
[11]LIAO Y X,ROLAND R,LUCAS D.Baseline closure model for dispersed bubbly flow:Bubble coalescence and breakup[J].Chemical Engineering Science,2015,122:336-349.
[12]ZUZANA B,THODORIS K,MARGARITIS K.Bubble-particle collision interaction in flotation systems[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2015,473:95-103.
[13]丁玉栋,廖强,朱恂,等.液体通流矩形槽道可渗透壁面处气泡生长及液相侵渗传输特性研究[J].机械工程学报,2013,49(14):19-124.DING Y D,LIAO Q,ZHU X,et al.Characteristics of bubble growth and water invasion at the permeable sidewall in rectangular liquid flow channel[J].Journal of Mechanical Engineering,2013,49(14):19-124.
[14]杨辉,朱春英,马友光,等.非牛顿流体中双喷嘴连续气泡的生成与聚并[J].化学工程,2016,44(8):37-41.YANG H,ZHU C Y,MA Y G,et al.Continuous formation and coalescence of bubbles through double-nozzle in non-Newtonian fluid[J].Chemical Engineering,2016,44(8):37-41.
[15]杜煜昊,熊凯文,张莹,等.水平布置等径气泡上升运动数值模拟分析[J].计算力学学报,2016,33(6):889-894.DU Y H,XIONG K W,ZHANG Y,et al.Analysis of numerical simulation on horizontal arrangement equal bubbles rising[J].Chinese Journal of Computational Mechanics,2016,33(6):889-894.
[16]GADDIS E S,VOGELPOHL A.Bubble formation in quiescent liquids under constant flow conditions[J].Chemical Engineering Science,1986,41(1):97-105.
[2]张志友,金良安,何升阳,等.气泡上浮运动与传热传质的耦合模型[J].高校化学工程学报,2018,32(2):358-367.ZHANG Z Y,JIN L A,HE S Y,et al.Study on coupling models for bubble floatation accompanied with heat and mass transfer[J].Journal of Chemical Engineering of Chinese Universities,2018,32(2):358-367.
[3]温宇,朱春英,付涛涛,等.不等宽T型分岔微通道内气泡的体积分配规律及关联[J].高校化学工程学报,2016,30(1):19-25.WEN Y,ZHU C Y,FU T T,et al.Volume distribution and correlation of bubbles in a microfluidic T-junction with unequal width bifurcations[J].Journal of Chemical Engineering of Chinese Universities,2016,30(1):19-25.
[4]LAU R,MO R,BEVERLY S W S.Bubble characteristics in shallow bubble column reactors[J].Chemical Engineering Research and Design,2010,88(2):197-203.
[5]RIBEIRO C P J R,LAGE P L C.Experimental study on bubble size distributions in a direct-contact evaporator[J].Brazilian Journal Chemical Engineering,2004,21(1):69-81.
[6]谢育博,刘道平,杨亮,等.蒸馏水和自来水中悬浮气泡表面天然气水合物生长特性的实验研究[J].化工进展,2017,36(1):129-135.XIE Y B,LIU D P,YANG L,et al.Experimental study on the growth characteristics of natural gas hydrate formation on suspended gas bubbles in distilled water and tap water[J].Chemical Industry and Engineering Progress,2017,36(1):129-135.
[7]李希,李兆奇,管小平,等.气液鼓泡塔流体力学研究进展[J].高校化学工程学报,2015,29(4):765-779.LI X,LI Z Q,GUAN X P,et al.Progress in hydrodynamics of gas-liquid bubble columns[J].Journal of Chemical Engineering of Chinese Universities,2015,29(4):765-779.
[8]周强,郭晓峰,李军,等.竖直上升气液泡状流数学模型封闭的研究[J].化工进展,2016,35(10):3049-3056.ZHOU Q,GUO X F,LI J,et al.Comparative investigation on closure models for the simulation of vertical gas-liquid bubbly upflow[J].Chemical Industry and Engineering Progress,2016,35(10):3049-3056.
[9]MULLER R L,PRINCE R G H.Regimes of bubbling and jetting from submerged orifices[J].Chemical Engineering Journal,1972,27(8):1583-1592.
[10]ALADJEM C T,SHEMER L,BARNEA D.On the interaction between two consecutive elongated bubbles in a vertical pipe[J].International Journal of Multiphase Flow,2000,26(12):1905-1923.
[11]LIAO Y X,ROLAND R,LUCAS D.Baseline closure model for dispersed bubbly flow:Bubble coalescence and breakup[J].Chemical Engineering Science,2015,122:336-349.
[12]ZUZANA B,THODORIS K,MARGARITIS K.Bubble-particle collision interaction in flotation systems[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2015,473:95-103.
[13]丁玉栋,廖强,朱恂,等.液体通流矩形槽道可渗透壁面处气泡生长及液相侵渗传输特性研究[J].机械工程学报,2013,49(14):19-124.DING Y D,LIAO Q,ZHU X,et al.Characteristics of bubble growth and water invasion at the permeable sidewall in rectangular liquid flow channel[J].Journal of Mechanical Engineering,2013,49(14):19-124.
[14]杨辉,朱春英,马友光,等.非牛顿流体中双喷嘴连续气泡的生成与聚并[J].化学工程,2016,44(8):37-41.YANG H,ZHU C Y,MA Y G,et al.Continuous formation and coalescence of bubbles through double-nozzle in non-Newtonian fluid[J].Chemical Engineering,2016,44(8):37-41.
[15]杜煜昊,熊凯文,张莹,等.水平布置等径气泡上升运动数值模拟分析[J].计算力学学报,2016,33(6):889-894.DU Y H,XIONG K W,ZHANG Y,et al.Analysis of numerical simulation on horizontal arrangement equal bubbles rising[J].Chinese Journal of Computational Mechanics,2016,33(6):889-894.
[16]GADDIS E S,VOGELPOHL A.Bubble formation in quiescent liquids under constant flow conditions[J].Chemical Engineering Science,1986,41(1):97-105.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |