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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v15.i5.30
pages 429-437

POROUS SCREEN APPLIED IN LIQUID ACQUISITION DEVICE CHANNEL AND CFD SIMULATION OF FLOW IN THE CHANNEL

John B. McQuillen
NASA Glenn Research Center, Cleveland, Ohio 44135, USA
David J. Chato
NASA Glenn Research Center, Cleveland, Ohio 44135, USA
Brian J. Motil
NASA Glenn Research Center, Cleveland, OH 44135, USA
Michael P. Doherty
NASA Glenn Research Center, Cleveland, Ohio 44135, USA
David F. Chao
Fluid Physics and Transport Branch, Ohio Aerospace Institute at NASA Glenn Research Center, Cleveland, OH 44135, USA
Nengli Zhang
Pearlica Technologies, Inc.

RESUMO

In low gravity or the reduced acceleration environments that occur during space missions, cryogenic liquid propellants cannot always be transferred from storage tanks to an engine using buoyancy or acceleration forces. A capillary-flow liquid acquisition device (LAD) for cryogenic propellants has been developed and tested in NASA Glenn Research Center. The prototypical screen channel LAD was fabricated with a screen, covering a rectangular flow channel with a cylindrical outlet tube, and was tested with liquid oxygen (LOX). The screen's small pore openings prevented gas/vapor from entering the channel while allowing liquid to pass freely. Vapor ingestion occurs when the pressure drop in the LAD channel exceeds the bubble point for the screen, and if there is vapor adjacent to the screen. "Bubble point" is defined as the differential pressure across the screen that overcomes the surface tension of the liquid on the screen. It is, therefore, the most significant concern for screen-channel LAD designs. In order to better understand the performance of the screen channel LAD, a computational fluid dynamics (CFD) simulation of LOX flow through the LAD screen channel was undertaken. It revealed that the flow passing through the screen and into the channel is continuously augmented along the channel length, but is subjected to increasing flow resistance along the channel length. The gravity effects on the flow in LAD channel are tested and analyzed through comparing the simulation results under different gravity conditions.


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