Abstract: In the process of spraying of liquid-solid suspension, there are many factors that affect the diameter (d₃₂) of spray droplet of the suspension, such as suspension pressure, solid content and diameter and density of mini-particle. The diameter of maximum probability distribution of the spray droplet of suspension was measured with the system of 3D LDV/APV and the process of spraying was recorded with the FASTCAM-Super in situ measurement.The relationship of d₃₂ with the suspension pressure and mini-particle density is non-monotonic,with d₃₂ decreasing then increasing with suspension pressure and mini-particle density, while the d₃₂ is increasing monotonously with mini-particles diameter and solid content in suspension. The experiment matched well with the mathematical model in the previous.

Key words:

压力式雾化器, 激光多普勒, 体积-表面积平均直径

摘要： 研究了混合液压力、固体质量分数、固体微粒直径、微粒密度对雾滴的体积-表面积直径（d₃₂）的影响.在实验中采用三维激光相位多普勒LDV/APV测试系统测定了最大概率分布的雾滴直径（d₃₂），使用高速摄像仪记录了雾化的过程.研究发现混合液的压力和固体微粒密度对雾滴直径（d₃₂）的影响呈非单调性，雾滴直径（d₃₂）随其增大先减小、再增加；而雾滴直径随固体微粒的直径、混合液固体质量分数的增加而增大.实验结果与数学模型能较好地吻合，可为工业性设计提供理论依据.

关键词:

压力式雾化器, 激光多普勒, 体积-表面积平均直径