倾斜对管内上升泡状流局部界面参数分布的影响

doi:10.3969/j.issn.0438-1157.2013.07.015

化工学报 ›› 2013, Vol. 64 ›› Issue (7): 2411-2417.DOI: 10.3969/j.issn.0438-1157.2013.07.015

倾斜对管内上升泡状流局部界面参数分布的影响

幸奠川¹, 阎昌琪¹, 孙立成¹, 侯大文²

1. 哈尔滨工程大学核安全与仿真技术国防重点学科实验室, 黑龙江哈尔滨 150001;
2. 中国人民解放军92337部队, 辽宁大连 116021

收稿日期:2012-11-26 修回日期:2013-01-19 出版日期:2013-07-05 发布日期:2013-07-05
通讯作者: 幸奠川(1986- ),男,博士研究生
作者简介:幸奠川(1986- ),男,博士研究生。
基金资助:
国家自然科学基金项目(51076034,11175050);中央高校基本科研基金项目(HEUCFZ1122)。

Effects of inclination on interfacial parameter distributions of upward bubbly flow in pipe

XING Dianchuan¹, YAN Changqi¹, SUN Licheng¹, HOU Dawen²

1. National Defense Key Subject Laboratory for Nuclear Safety and Simulation Technology, Harbin Engineering University, Harbin 150001, Heilongjiang, China;
2. Chinese People's Liberation Army 92337 Armed Forces, Dalian 116021, Liaoning, China

Received:2012-11-26 Revised:2013-01-19 Online:2013-07-05 Published:2013-07-05
Supported by:
supported by the National Natural Science Foundation of China (51076034,11175050)and the Fundamental Research Funds for the Central Universities (HEUCFZ1122).

摘要/Abstract

摘要： 采用双头光纤探针法研究了倾斜对圆管内(I.D.50 mm)上升泡状流界面参数径向分布的影响。探针测量的局部界面参数包括局部空泡份额、界面面积浓度(IAC)和局部气泡通过频率。实验以空气和水为工质,表观速度分别为0.002~0.037 m·s^-1和0.072~0.569 m·s^-1;倾斜角度为5°、15°和30°。结果表明,竖直条件下界面参数呈核峰型、壁峰型、中间型及过渡型4种典型的分布。倾斜条件下大量气泡向上部聚集,界面参数分布不对称。中间宽峰向通道上部倾斜,且峰值随倾斜角度增加而增大。同时,下壁面附近峰值被削弱,甚至消失,上壁面附近峰值迅速增大。界面参数沿直径从r_i/R=-0.84到上半部分峰值处逐渐增加,且增加速率随倾斜角度增加而增大。倾斜条件下Sauter直径明显比竖直条件下大。

关键词: 双头光纤探针, 倾斜管, 泡状流, 界面参数分布, 浮力

Abstract: Effects of inclination on radial distribution of interfacial parameters were investigated for air-water bubbly flow in a pipe with the diameter of 50 mm.The double optical fiber probe method was used for measuring the local parameters of void fraction,interfacial area concentration and bubble passing frequency.Air and water were used as working fluids,with the superficial velocities of 0.002—0.037 m·s^-1 and 0.072—0.569 m·s^-1,respectively.Three inclination angles of 5°,15° and 30° were selected for the experiments.Four classical distribution types of the core peak,wall peak,intermediate peak and transition appeared under vertical flow condition.While for the inclined condition,bubbles congregate toward the upper wall of the pipe,resulting in the asymmetrical distribution of these parameters.The central broad peak leaned to the upper part of the tube,with its peak value increasing as the inclination angle increased.In the meantime,the peak near the lower wall lowered gradually,even disappeared, while the other one near the upper wall escalated accordingly.The interfacial parameters increased diametrically from r_i/R=-0.84 to the peak location around the upper wall,with its variation rate increasing as the inclination angle increased.The Sauter mean diameter under inclined condition were larger than that of vertical flow.

Key words: double optical fiber probe, inclined pipe, bubbly flow, interfacial parameter distribution, buoyancy force

中图分类号:

TL334

幸奠川, 阎昌琪, 孙立成, 侯大文. 倾斜对管内上升泡状流局部界面参数分布的影响[J]. 化工学报, 2013, 64(7): 2411-2417.

XING Dianchuan, YAN Changqi, SUN Licheng, HOU Dawen. Effects of inclination on interfacial parameter distributions of upward bubbly flow in pipe[J]. CIESC Journal, 2013, 64(7): 2411-2417.

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倾斜对管内上升泡状流局部界面参数分布的影响

Effects of inclination on interfacial parameter distributions of upward bubbly flow in pipe

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