采用气泡-液体两相流动的欧拉-拉氏大涡模拟,研究了矩形通道内多股射流形成的气泡-液体两相湍流流动,得到了气液两相湍流瞬态结构,产生和发展过程.研究结果发现气泡和液体都有瞬态大涡结构,气泡脉动比液体的强.大涡模拟统计结果给出了有无气泡两种情况下的液体湍流脉动速度均方根值分布.瞬态和统计结果都表明,气泡增大了液体湍流,液体湍流来源于其自身的剪切产生和气泡的作用.这与二阶矩模型模拟结果定性一致.
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