【摘要】 本文基于CFD技术对文丘里式微气泡发生器进行了研究，分析了微气泡发生器内流动特性及微气泡在管内扩散段的发展过程，得出气泡在湍流剪切作用下逐渐破碎。同时，分析了喉部、渐扩角对气泡发生器发泡性能的影响规律，通过实验对模拟结果进行了验证。结果表明：随着喉部内径的增大，气泡粒径呈逐渐增大趋势，入口压力也逐渐增大；随着扩张角的增大，气泡粒径呈先减小后增大的趋势；改变喉部结构形式，当采用阶梯喉部结构时，气泡粒径更小。更多还原

【Abstract】 In this paper, we studied the venturi type microbubble generator based on CFD technology, analyzed the flow characteristics inside the microbubble generator and the development process of microbubbles in the diffusion section of the tube, and concluded that the bubbles are gradually broken under the effect of turbulent shear. At the same time, the influence law of the throat and tapering angle on the foaming performance of the bubble generator was analyzed, and the simulation results were verified by experiments. The results show that: with the increase of the inner diameter of the throat, the bubble particle size tends to increase gradually, and the inlet pressure also increases gradually; with the increase of the expansion angle, the bubble particle size tends to decrease first and then increase; when the throat structure is changed, the bubble particle size is smaller when the stepped throat structure is used.更多还原