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平板微气泡减阻数值模拟及影响因素分析

DOI: 10.11990/jheu.201407002

Keywords: 微气泡, 减阻, 机理, 数值模拟, 混合物模型, 相群平衡模型, 多相流, 通气

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Abstract:

为了进一步揭示微气泡减阻机理,并探讨其实用化进程的影响因素,采用混合物多相流模型对平板微气泡减阻(BDR)问题进行了二维数值模拟,讨论了重力及底部和顶部2种通气方式的影响,对微气泡减阻机理进行了分析.利用相群平衡模型(population balance model)三维数值模拟了平板底部通气和侧壁通气,对平板三维效应进行了研究.结果表明:重力对大气泡影响较大;对于顶部通气方式,重力使气泡停留在边界层,从而使减阻效果得到改善;减阻率与气层厚度之间存在一定的关系.侧壁通气的减阻效果不佳,三维效应也降低减阻效果.

References

[1]  CECCIO S L. Friction drag reduction of external flows with bubble and gas injection[J]. Annual Review of Fluid Mechanics, 2010, 421: 183-203.
[2]  LEGNER H H. A simple model for gas bubble drag reduction[J]. Physics of Fluids, 1984, 2712: 2788-2790.
[3]  MADAVAN N , MERLE C L, DEUTSCH S. Numerical investigations into the mechanisms of micro-bubble drag reduction[J]. Journal of Fluids Engineering, 1985, 1073: 370-377.
[4]  UN R F, GIBELING H J, MAXEY M R, et al. Validation of two-fluid Eulerian CFD modeling for microbubble drag reduction across a wide range of Reynolds numbers[J]. Journal of Fluids Engineering, 2007, 1291: 66-79.
[5]  FERRANTE A, ELGHOBASHI S. Reynolds number effect on drag reduction in a microbubble-laden spatially developing turbulent boundary layer[J]. Journal of Fluid Mechanics, 2005, 543: 93-106.
[6]  LU Jiacai, FERNáNDE A, TRYGGVASON G. The effect of bubbles on the wall drag of a turbulent channel flow[J]. Physics of Fluids, 2005, 179: 095102.
[7]  MOHANARANGAM , CHEUNG S C P, TU J Y, et al. Numerical simulation of micro-bubble drag reduction using population balance model[J]. Ocean Engineering, 2009, 3611: 863-872.
[8]  丁力. 微气泡减阻喷气参数换算关系研究[D]. 武汉: 武汉理工大学, 2012: 1-47. DING Li. The conversion relation research about jet parameters of micro-bubbles drag reduction[D]. Wuhan: Wuhan University of Technology, 2012: 1-47.
[9]  陈显文. 回转体微气泡减阻和噪声的数值研究[D]. 武汉: 华中科技大学, 2012: 1-77. CHEN Xianwen. Numerical simulation of axisymmetric body’s drag reduction and noise by micro bubbles[D]. Wuhan: Huazhong University of Science and Technology, 2012: 1-77.
[10]  王炳亮. 船舶微气泡减阻数值模拟及机理研究[D]. 哈尔滨: 哈尔滨工程大学, 2012: 1-70. WANG Bingliang. Numerical simulation and mechanism research on drag reduction of ship by microbubbles[D]. Harbin: Harbin Engineering University, 2012: 1-70.
[11]  MADAVAN N , DEUTSCH S, MERLE C L. Reduction of turbulent skin friction by microbubbles[J]. Physics of Fluids, 1984, 272: 356-363.

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