NASA NTRS · 19830000050
Discriminating Between Liquid and Gas Flows
Abstract
Flow sensor distinguishes flowing gases from liquids. Sensor allows liquids to pass, but would signal valve to turn off flow of gases. Concept developed for propulsion systems in which liquid fuel is forced out of storage tank by high-pressure gas. Controller stops flow of gas from fuel tank after liquid has been depleted.
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Berdahl, C. M.. 1983-08-01. Discriminating Between Liquid and Gas Flows. https://ntrs.nasa.gov/citations/19830000050
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