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Warm Pressurant Gas Effects on the Liquid Hydrogen Bubble PointThis paper presents experimental results for the liquid hydrogen bubble point tests using warm pressurant gases conducted at the Cryogenic Components Cell 7 facility at the NASA Glenn Research Center in Cleveland, Ohio. The purpose of the test series was to determine the effect of elevating the temperature of the pressurant gas on the performance of a liquid acquisition device. Three fine mesh screen samples (325 x 2300, 450 x 2750, 510 x 3600) were tested in liquid hydrogen using cold and warm noncondensible (gaseous helium) and condensable (gaseous hydrogen) pressurization schemes. Gases were conditioned from 0 to 90 K above the liquid temperature. Results clearly indicate a degradation in bubble point pressure using warm gas, with a greater reduction in performance using condensable over noncondensible pressurization. Degradation in the bubble point pressure is inversely proportional to screen porosity, as the coarsest mesh demonstrated the highest degradation. Results here have implication on both pressurization and LAD system design for all future cryogenic propulsion systems. A detailed review of historical heated gas tests is also presented for comparison to current results.
Document ID
20140011430
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Hartwig, Jason W.
(NASA Glenn Research Center Cleveland, OH United States)
McQuillen, John B.
(NASA Glenn Research Center Cleveland, OH United States)
Chato, David J.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 8, 2014
Publication Date
September 1, 2013
Subject Category
Spacecraft Propulsion And Power
Propellants And Fuels
Fluid Mechanics And Thermodynamics
Report/Patent Number
NASA/TM-2013-216569
E-10057
GRC-E-DAA-TN10057
AIAA Paper 2013-3982
Meeting Information
Meeting: International Energy Conversion Engineering Conference
Location: San Jose, CA
Country: United States
Start Date: July 14, 2013
End Date: July 17, 2013
Sponsors: American Society of Mechanical Engineers, American Inst. of Aeronautics and Astronautics, American Society for Electrical Engineers, Society of Automotive Engineers, Inc.
Funding Number(s)
WBS: WBS 645454.01.04.04.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Liquid Hydrogen
Liquid Acquisition Device
Warm Pressurant Gas
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