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为了获得均匀横向气流中单液滴变形、破碎特性,采用高速摄像机对液滴的变形、破碎过程进行了测量.通过试验获得了液滴初始直径对液滴破碎模式、变形时间、变形与破碎总时间、无量纲索太尔平均直径的影响.在试验设计工况下所得结果表明:液滴破碎临界韦伯数随液滴初始直径的增加而增加;液滴初始直径增加使得液滴由单一的破碎模式转变成多种破碎模式共生的混合型破碎模式;相同韦伯数下,在初始直径尺寸较大的区域液滴变形时间、变形与破碎总时间都比尺寸较小的区域要大,变形时间随韦伯数增加呈先减小后不变的线性变化关系,而变形与破碎总时间随韦伯数增加呈先减小后增加再减小的线性变化关系;液滴初始直径对无量纲索太尔平均直径的影响能力要强于气液初始相对速度对其影响.
In order to obtain the deformation and breaking characteristics of a single drop in uniform transverse airflow, the droplet deformation and breaking process were measured by high-speed camera.The droplet breaking mode, deformation time, deformation and crushing Time and dimensionless Sothir diameter.The results obtained under the experimental design conditions show that the critical Weber number of the droplet breakup increases with the increase of the initial diameter of the droplet.The increase of the initial diameter of the droplet makes the droplet from a single break Mode into a variety of crushing mode symbiotic mixed-type crushing mode; the same Weber number, the larger the initial diameter size of the droplet deformation time, the total deformation and crushing time smaller than the size of the larger area, the deformation time The Weber number increases linearly with the first decrease, while the total time of deforming and breaking linearly decreases with increasing Weber number first, then increases and then decreases. The initial droplet diameter is proportional to the dimensionless Sauter ’s average The influence of diameter is stronger than the initial relative velocity of gas and liquid.