微气泡减阻的二相湍流边界层模型计算

利用边界层中注入微气泡来降低固体壁面摩擦阻力是一项有实用价值且有待进一步研究的减阻技术.本文以含微气泡的湍流边界层为研究对象,以气液二相流理论为基础,对二相湍流边界层控制方程进行了详细讨论,并利用差分网格法进行了求解,计算结果表明微气泡具有明显的减阻效果.最后对影响减阻效果的因素进行了分析,指出了今后的研究方向.

Model Calculation of Two-phase Turbulence Boundary Layer in Reducing Friction Resistance by Microbubbles

To reduce friction resistance of a solid wall by injecting microbubbles into the boundary layer between the wall and fluid is a technology of practical value and needs studying further. In this paper, the turbulence boundary layer with microbubbles therein is taken as study object, based on gas-liquid two-phase flow theory, the control equations of the two-phase turbulence boundary layer are discussed in detail and solved by difference mesh method. Calculation results show that microbubbles in the boundary layer can reduce friction resistance significantly. Finally, some factors that influence the effect of friction reduction are analyzed and further study trends are pointed out.