均匀液滴尺寸及间距的实验研究

Experimental study of uniform droplets size and space

液滴发生器产生液滴的尺寸和间距影响液滴层的辐射和蒸发特性,液滴尺寸及间距的可控性值得重点关注。根据Weber的射流不稳定修正方程,确定了均匀液滴流产生的无量纲波数及扰动频率范围,结合射流质量守恒,分析了均匀液滴流中液滴的尺寸和间距与无量纲波数的关系。在不同喷孔直径和射流压力下,对理论和实验结果进行了对比,验证了液滴尺寸和液滴间距的理论计算结果,为液滴层辐射蒸发特性的研究提供了依据。

The size and space of droplets produced by the droplet generator affect the radiation and evaporation characteristics of the droplet layer,and the controllability of the size and space of the droplets deserves special attention.According to Weber’s jet instability correction equation,the dimensionless wave number and disturbance frequency range of uniform droplet flow were determined.Combined with the mass conservation of jet,the relationship between the dimensionless wave number and the size and space of droplets in uniform droplet flow were analyzed.The theoretical and experimental results were compared under different nozzle diameters and jet pressures,which verified the theoretical calculation results of droplet size and spacing,and provided a basis for the study of droplet layer radiation evaporation characteristics.