摘要
本文基于OpenFOAM两相欧拉求解器(twoPhaseEulerFoam)对二维平板进行微气泡减阻数值模拟。模型直接求解两相N-S方程,同时采用标准k-ε湍流模型,并考虑两相间作用力的影响,通过求解界面输运方程来模拟气泡的聚并和破碎。将数值结果和Madavan[1]试验结果进行对比,验证了模型的可行性。分析了不同流速下气泡直径、通气速度、浮力对减阻率的影响,并且研究了气泡对边界处流体速度分布、气体体积分数的影响。从数值结果可以看出通气速度较大且气泡直径较小时,减阻效率高,并且浮力对减阻有一定影响。
A numerical model was established to perform simulation for micro-bubble drag reduction of a twodimensional plate based on twoPhaseEulerFoam solver in OpenFOAM, which, taking into account the influence of forces between two phases, solved two-phase Navier-Stokes equation directly with the standard k-εturbulence model and simulated the bubble break-up and coalescence by solving interface area transport equation. The numerical results were compared with the experimental findings of Madavan to verify the feasibility of this model. The influence of bubble diameter, air flow rate and buoyancy on drag reduction efficiency with different flow velocities was analyzed and the influence of bubbles on fluid velocity distribution and gas volume fraction near the boundary was studied. It is shown that a higher efficiency of drag reduction will result from a higher air flow rate and bubbles with smaller diameters, and that buoyancy does have some effects on drag reduction.
作者
赵晓杰
宗智
姜宜辰
ZHAO Xiao-jie;ZONG Zhi;JIANG Yi-chen(School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Dalian 116024,China;Liaoning Engineering Laboratory for Deep-Sea Floating Structures,Dalian 116024,China)
出处
《船舶力学》
EI
CSCD
北大核心
2020年第8期989-996,共8页
Journal of Ship Mechanics
基金
国家自然科学基金重点项目(51679037,51639003)
973资助项目(2013CB036101)
高技术船舶专项资助课题。
