Helically-Supported Capillary Channels as Liquid Acquisition Devices in Microgravity
Terrazas, Maverick J
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Fluid-filled springs are capillary channels that can be used as liquid acquisition devices to passively separate two-phase systems in microgravity. However, these channels must be primed and connected to a pressure reservoir with the desired fluid in order to take advantage of their separating abilities. Several experiments were developed to connect a low-pressure reservoir to a test section consisting of two manifolds bridged by water-filled springs in order to support drop absorption and capillary pumping back to the low-pressure reservoir during brief periods microgravity. Microgravity experiments include the use of both parabolic flights and drop towers, where both droplet absorption at varying Weber number and system priming is examined. In addition, several 1-g experiments were conducted to investigate other import variable including impact parameter, channel pressure, and spring pitch.