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| Numerical simulation of gas-liquid-solid flow in a new internal spiral-grooved tube |
| Received:January 16, 2017 Revised:March 30, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20170116004 |
| KeyWord:CFD three-fluid model KTGF internal spiral-grooved tube |
| Author | Institution |
| 辛亚男 |
北京化工大学 化学工程学院, 北京 |
| 张建文 |
北京化工大学 化学工程学院, 北京 |
| 姜爱国 |
北京化工大学 化学工程学院, 北京 |
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| Abstract: |
| A computational fluid dynamics (CFD) modeling of gas(natural gas)-liquid(water)-solid (hydrate) flow in a new internal spiral-grooved tube is presented.The effects of superficial velocity(0.3 m/s,0.5 m/s,and 0.7 m/s),the particle size(500 μm,750 μm,and 1000 μm),bubble size(10 μm,100 μm,and 1000 μm),the pitch(400 mm,800 mm),thread head number(12,20)and spiral direction on the flow features of the new spiral-grooved tube using the Eulerian-Eulerian-Eulerian method with the kinetic theory of granular flow(KTGF)are systematically studied.Numerical simulation results show that because of the internal spiral grooves and the density difference among liquid,solid particle and gas,solid and gas accumulate to the center of tube and the concentration decreases near the wall.The larger velocity and bubble size are,the smaller the concentrations of hydrate and natural gas near the wall are;because the density of natural gas is the smallest,natural gas is more concentrated in the center and the closer to the wall,and the less content is.The larger particle size is,the smaller the solid volume fraction near the wall is,while lower influence on the distribution of natural gas.With the decrease of pitch and increase of the number of thread heads,the intensity of spiral fluid increases,and the separation effect of gas-liquid-solid three-phase is enhanced.Furthermore,the content of hydrate and natural gas near the wall is reduced.The results indicate that the separation effect of gas-liquid-solid three-phase is not sensitive to the change of spiral direction as well. |
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