基于大涡模拟的槽道微气泡减阻数值模拟

以大涡模拟和mixture两相流模型计算微气泡对湍流边界层的影响,以达到减小湍流边界层阻力的目的.数值模拟中,在同一水流速度和不同气泡喷射速度下,阻力随着气泡的喷射速度的增加而得到很大的减小,但当气泡量达到饱和时,减阻效果下降.数值模拟结果表明,在湍流边界层中注入微气泡是一种有效的减阻方式.

Channel Flow Skin Friction Reduction by Micro-bubbles Based on LES

The effect of micro-bubbles on the turbulent boundary layer was calculated by the LES and mixture model,in order to reduce the drag of turbulent boundary layer.The numerical simulations showed that at one water velocity and different micro-bubbles injection velocity,the drag reduces with the increase of the micro-bubbles injection velocity,but when the micro-bubble was in saturation,the effect of micro-bubbles declined to reduce the drag in turbulent boundary layers.The results indicated that it is an effective way to reduce the drag through injecting micro-bubbles into the turbulent boundary layer.