【摘要】 由流场中气泡主要随大尺度涡体随机运动而运动的物理模型,建立气泡符合Markov链过程随机游动数学模型,并简化为一步转移随机游动模型,已知初边值条件后,可实现计算机模拟气泡游动,求解气泡源后断面气泡密度分布.具体提出渐变流场内参数u_y,（u′_y²）^1/2和K值及边界条件确定方法,使掺气减蚀设施后断面掺气浓度分布和有效保护长度可以得解.更多还原

【Abstract】 The paper gives the numerical simulation of air bubbles in turbulent flow based on the turbulent theory. The movement of air bubbles accords with the process of Markov-chain random walk. Its tracing can be realized by computer when the condition of flow is given. Also, the density distribution of air-bubbles on each section and variation of air-concentration along the bottom flow can be calculated. Therefore, the effective length for preventing cavitation erosion along the passage downstream from the aerator can be decided. The method of flowparameters uy,u’y2 and K in the uniform flow is discussed.更多还原