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›› 2006, Vol. 6 ›› Issue (2): 161-166.

• 流动与传递 •    下一篇

液相介质对水平气液间歇流动的压降影响

许晶禹,吴应湘,李东晖   

  1. 中国科学院力学研究所工程科学研究部
  • 出版日期:2006-04-20 发布日期:2006-04-20

Effects of Liquid Phase Properties on Pressure Drop during Horizontal Gas-Liquid Intermittent Flow

XU Jing-yu,WU Ying-xiang,LI Dong-hui   

  1. Division of Engineering Sciences, Institute of Mechanics, Chinese Academy of Sciences
  • Online:2006-04-20 Published:2006-04-20

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摘要： 研究了水平管内不同液相介质(水、油和不同浓度的CMC溶液)对气液两相间歇流动压降的影响. 实验管道为内径50 mm的透明有机玻璃管，从入口到分离器长约30 m，实验段由2个长3 m的水平管组成. 共记录了320组不同表观流速下的压降信号：油相0.17~1.85 m/s，水相0.17~2.48 m/s，CMC溶液0.17~1.42 m/s，气相0.06~3.40 m/s. 结果表明，液相为牛顿流体(油或水)的气液流动，随着表观气相流速的增大，压降呈增加趋势；非牛顿幂率流体(不同浓度的CMC溶液)的管道流动，当流动指数低于一定值时，压降随气相流量的增加呈降低趋势，并且低于单液相流动的压降. Lockhart-Martinelli模型过高地预测了气-非牛顿幂率流体两相的压降.

关键词: 气液间歇流动, 幂率流体, 压降, Lockhart-Martinelli模型

Abstract: The effects of different liquid phases (water, oil and CMC solutions) on pressure drop during horizontal gas-liquid intermittent flow were experimentally investigated. The total length of the pipe between the entrance and the separation unit is approximately 30 m. The test section consists of two 3 m long horizontal pipes. Up to 320 experimental tests have been conducted under the following conditions: superficial oil velocity 0.17~1.85 m/s, superficial water velocity 0.17~2.48 m/s, superficial CMC solutions velocity 0.17~1.42 m/s and superficial air velocity 0.06~3.40 m/s. It is shown that for gas-Newtonian liquid flow the pressure drop increases with the increase of the superficial air velocity at constant superficial liquid velocity. But for power-law liquid with the lower value of flow behavior index, the pressure drop of gas-non-Newtonian liquid flow might actually be reduced below the value for the liquid flowing alone at the same volumetric rate. Furthermore, the Lockhart-Martinelli model overestimates the pressure drop for gas-power-law liquid flow.

Key words: gas-liquid intermittent flow, power-law fluid, pressure drop, Lockhart-Martinelli model