微气泡降阻研究进展  

Research Achievement of Microbubble Drag Reduction

作　　者：杨余旺[1] 孙思诚[1] 王增刚[1] 

机构地区：[1]南京理工大学机械学院,南京210094

出　　处：《南京理工大学学报》2001年第2期220-224,共5页Journal of Nanjing University of Science and Technology

摘　　要：该文介绍了微气泡降阻机理、研究方法和重要结论。理论分析提出微气泡降阻机理在于其引起湍流边界层结构的变化 ;实验证明了微气泡对湍流边界层的降阻作用以及气泡尺度、主流速度等对降阻作用的影响 ;数值方法利用适当的流场模型、湍流模型和差分格式 ,模拟边界层和气泡数等对降阻的影响。这些研究得到了较为一致的结论 。This paper introduces mechanism,research methods and main results about microbubble dray reduction. Based on theoretical analysis, microbubble drag reduction is due to structure change of turbulent boundary layer caused by the microbubbles.Experiments testify microbubble drag reduction for turbulent boundary layer, as well as bubble size,main flow velocity,etc. affecting the reduction; with proper flow field model,turbulent model and difference scheme, numerical methods simulate the effect of boundary layer and bubble numbers on dray reduction. Coinciding conclusion is obtained through these methods, and this provides strong background for further engineering application of microbubble drag reduction.

关 键 词：微气泡 减阻 湍流 边界层 

分 类 号：O357.4[理学—流体力学] O357.5[理学—力学]