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Solid Hydrogen Experiments for Atomic Propellants: Image AnalysesThis paper presents the results of detailed analyses of the images from 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 agglomerates, and the total mass of hydrogen particles were estimated. Particle sizes of 1.9 to 8 mm (0.075 to 0.315 in.) were measured. The particle agglomerate sizes and areas were measured, and the total mass of solid hydrogen was computed. A total mass of from 0.22 to 7.9 grams of hydrogen was frozen. Compaction and expansion of the agglomerate implied that the particles remain independent particles, and can be separated and controlled. These experiment image analyses are one of the first steps 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
Document Type
Technical Memorandum (TM)
Palaszewski, Bryan
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Propellants And Fuels
Report/Patent Number
NAS 1.15:211297
AIAA Paper 2001-3233
Meeting Information
37th Joint Propulsion Conference and Exhibit(Salt Lake City, UT)
Funding Number(s)
PROJECT: RTOP 713-74-10
Distribution Limits
Work of the US Gov. Public Use Permitted.
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