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Solid Hydrogen Experiments for Atomic PropellantsThis paper illustrates experiments that were conducted on the formation of solid hydrogen particles in liquid helium. Solid particles of hydrogen were frozen in liquid helium, and observed with a video camera. The solid hydrogen particle sizes, their molecular structure transitions, and their agglomeration times were estimated. article sizes of 1.8 to 4.6 mm (0.07 to 0. 18 in.) were measured. The particle agglomeration times were 0.5 to 11 min, depending on the loading of particles in the dewar. These experiments are the first step toward visually characterizing these particles, and allow designers to understand what issues must be addressed in atomic propellant feed system designs for future aerospace vehicles.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Palaszewski, Bryan
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
December 1, 2001
Subject Category
Propellants And Fuels
Report/Patent Number
AIAA Paper 2000-2855
NAS 1.15:211292
Meeting Information
Meeting: 36th Joint Propulsion Conference and Exhibit
Location: Huntsville, AL
Country: United States
Start Date: July 16, 2000
End Date: July 19, 2000
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)
PROJECT: RTOP 713-74-10
Distribution Limits
Work of the US Gov. Public Use Permitted.
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