降阻机理 meaning in English

drag reduction mechanism

This paper introduces mechanism , research methods and main results about microbubble dray reduction
该文介绍了微气泡降阻机理、研究方法和重要结论。
( 4 ) the drag reduction of plane - surfaces with v - shaped grooves is given out by direct numerical simulation , and the drag reduction mechanism in the base of the secondary flow theory is suggested
( 4 )利用直接数值模拟方法求得平板上v ?型条纹表面上的降阻情况，并给出基于二次流动理论的降阻机理。
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
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。