Design of Laminar Operating Rotary Atomizers under Consideration of the Detachment Geometry
Design of Laminar Operating Rotary Atomizers under Consideration of the Detachment Geometry
复制标题
考虑分离几何形状的层流操作旋转雾化器设计
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
P. Walzel
中科院分区：
文献类型：
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作者：
T. Schröder;P. Walzel
为了生产出粒径分布窄的液滴，研制了一种新型的喷雾系统，即具有大量较大孔的旋转雾化器（LAMROT），液体通过这些孔层流。有了这个概念，就有可能将毛细管淋浴的优点与对塞子不敏感的操作需求和高通量的目标结合起来。雾化器被设计成一个多孔圆柱体。在这种装置中，液体像在明渠流动一样流过孔。在孔出口处，它变成自由射流，按瑞利型解体，产生几乎单分散的液滴。讨论了该结构的主要特点。随着孔几何形状的计算和确定，显示了在所需层流条件下雾化器中均匀分布液体的可能性。此外，还将介绍孔出口处分离边缘设计的最新成果。由于不利的流动条件，有必要在第一个原型机的孔中安装管。这导致了复杂而昂贵的建筑，从而导致了进一步的发展。
In order to produce droplets with a narrow droplet size distribution, a new spraying system has been developed, i.e., a rotary atomizer with a multitude of comparatively large holes (LAMROT) through which the liquid flow is laminar. With this concept, it was possible to combine the advantages of capillary showers with the demand of plug insensitive operation and the aim of high throughput. The atomizer is designed as a multiple-hole cylinder. In this apparatus the liquid flows through the holes as in an open channel flow. At the hole exit, it changes into free jets which disintegrate according to the Rayleigh type giving rise to nearly monodisperse droplets. The main features of the construction are discussed. Along with calculation and determination of the hole geometry, possibilities for even distribution of the liquid in the atomizer for the required laminar conditions are shown. Furthermore, the latest results on the design of the detachment edges at the hole exits will be presented. Due to unfavorable flow conditions, it was necessary to fit tubes into the holes in the first prototype. This led to a complex and expensive construction and consequently caused further development.