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Solid Hydrogen Experiments for Atomic Propellants: Particle Formation, Imaging, Observations, and AnalysesThis report presents particle formation observations and detailed analyses of the images from experiments that were conducted on the formation of solid hydrogen particles in liquid helium. Hydrogen was frozen into particles in liquid helium, and observed with a video camera. The solid hydrogen particle sizes and the total mass of hydrogen particles were estimated. These newly analyzed data are from the test series held on February 28, 2001. Particle sizes from previous testing in 1999 and the testing in 2001 were similar. Though the 2001 testing created similar particles sizes, many new particle formation phenomena were observed: microparticles and delayed particle formation. These experiment image analyses are some of the first steps toward visually characterizing these particles, and they 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
November 1, 2005
Subject Category
Propellants And Fuels
Report/Patent Number
AIAA Paper 2003-4688
Meeting Information
39th Joint Propulsion Conference and Exhibit(Huntsville, AL)
Funding Number(s)
PROJECT: RTOP 713-74-10
PROJECT: RTOP 22-713-74-01
Distribution Limits
Work of the US Gov. Public Use Permitted.
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