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Power Calculations for Isentropic Compressions of Cryogenic NitrogenA theoretical analysis has been made of the power required for isentropic compressions of cryogenic nitrogen in order to determine the extent that the drive power for cryogenic tunnels might be affected by real gas effects. The analysis covers temperatures from 80 to 310K, pressures from 1.0 to 8.8 atm and fan pressure ratios from 1.025 to 1.200. The power required to compress cryogenic nitrogen was found to be lower than that required for an ideal diatomic gas by as much as 9.5 percent. Simple corrections to the ideal gas values were found to give accurate estimates of the real gas power values.
Document ID
19760021428
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Jerry B Adock (Langley Research Center Hampton, Virginia, United States)
Marilyn E Ogburn ORCID(University of Virginia Charlottesville, Virginia, United States)
Date Acquired
September 3, 2013
Publication Date
July 1, 1976
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
NASA-TM-X-73903
Accession Number
76N28516
Funding Number(s)
CONTRACT_GRANT: NSG-1010
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Keywords
Real gas
Nitrogen
Cryogenics
Wind tunnel
Isentropic compression
Power

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