Abstract
The Liquid Droplet Radiator (LDR) has an advantage over comparable conventional radiators in terms of the rejected heat power-weight ratio. Therefore, the LDR has attracted as an advanced radiator for high-power space systems that will be prerequisite for large space structures. In this study, the performance of a droplet emittor under microgravity condition has been investigated from the viewpoint of operational space use of the LDR in the future. From experiments, it is considered that the droplet emittor can produce uniform droplet streams under microgravity condition in the non-dimensional wave number range from 0.215 to 0.490. In this range, the droplet diameter and the spacing range are from 204 to 285 [μm] and from 445 to 1 160 [μm] respectively. And it is concluded that these diameter and spacing can be estimated by the equations based on the law of conservation of mass in the process of generating droplets.
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