Generation and Collection of Droplets under microgravity

研究了微重力条件下液滴辐射器中液滴发生器和液滴收集器的性能。结果，得出结论：（1）液滴发生器可以在微重力下产生直径和间隔均匀的均匀液滴流，（2）在由200 [μm]直径的液滴组成的均匀液滴流碰撞的情况下，在液滴收集器的表面上不发生飞溅，（3）在不均匀液滴流碰撞由大于400 [μm]的液滴组成的均匀液滴流的情况下发生飞溅，（4）离心收集器有效地携带收集的工作流体，（5）几毫米厚的液膜有效地防止400 [μm]直径的液滴飞溅，（6）飞溅与液滴流碰撞液滴收集器上的表面所形成的角度之间存在小的依赖性。

Performances of a droplet generator and a droplet collector in Liquid Droplet Radiator under microgravity were investigated. As a result, it is concluded that(1) Droplet generator can produce the uniform droplet stream whose diameter and spacing is uniform under microgravity,(2) Splashes don't occur at the surface of the droplet collector in case that the uniform droplet stream that consists of droplets of 200 [μm] diameter collides against,(3) Splashes occur in case that the non-uniform droplet stream collides against and the uniform droplet stream that consists of droplets larger than 400 [μm],(4) Centrifugal collector is effective to carry the working fluid that is collected,(5) Liquid film that is a few millimeter thick is effective to prevent droplets of 400 [μm] diameter from splashing,(6) There is small dependency between splashes and angles formed where a droplet stream collides against the surface on the droplet collector.