均匀液滴氧发生器液流破断的线性分析

 在均匀液滴氧发生器的研究过程中，液滴的形成是关键技术。利用压电换能器对液流施加扰动，初始扰动沿液流表面呈指数增长，直到将液流夹断生成液滴。通过理论分析，发现在影响液流表面增长率的诸多参数中，碱性过氧化氢溶液(BHP)表面张力的增加和液体分配板板孔直径的减小能够增大扰动增长率，其他参数的改变对增长率的影响非常小。通过分析还发现，BHP液体的喷射流速不同，要取得最大增长率的外界扰动频率也随之变化，外界施加扰动的频率随液流喷射流速的增大而增大。这些结果为均匀液滴氧发生器的实验研究提供有力的参考依据。

Linear capillary breakup of a liquid jet in the uniform droplet singlet oxygen generator

In the study of the uniform droplet singlet oxygen generator,the breakup of a round jet into the droplet stream is a vital technology.The disturbance applied threw by the piezoelectric transducer to the stream grow on the surface of the stream.The growth of the disturbance continues exponentially until a fluid parcel,is pinched off of the capillary.Analysis shows that several parameters affect the growth rate of the disturbance.The increase in the surface tension of the stream fluid and the decrease in the orifice diameter enhance the growth rate of the disturbance.The other parameters have less effect on the growth rate of the disturbance.The relatively broad bandwidth of the curve in the paper reveals that there are many potential growth rates on the surface that can theoretically determine the breakup of the jet into droplets.Hence,it will be the combination of rate and initial disturbance amplitude which pinches off the fluid into the desired droplets that we strive to control.