含微气泡二相湍流边界层减阻理论计算

摘要

The method of skin friction reduction of solid wall by injecting microbubbles to boundary layer is a practical technology and need studying further. In this paper the object of study is the turbulence boundary layer with microbubbles and the twophase equations based on gas-liquid twophase flow theory are put forward,and the equations are discussed in detail and solved by difference mesh method.The calculated results show that microbubbles may reduce skin friction markedly. Finally the factors influencing the effect of friction reduction are analyzed and the future study directions are pointed out.%利用边界层中注入微气泡降低固体壁面摩擦阻力的方法是一项有实用价值且有待进一步研究的减阻技术.本文以含有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,建立了二相湍流边界层控制方程,在对控制方程进行详细讨论的基础上,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,并指出了今后的研究方向.