NDLI: Visco jet joule-thomson device characterization tests in liquid methane

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Visco jet joule-thomson device characterization tests in liquid methane

Content Provider	NASA Technical Reports Server (NTRS)
Author	Jurns, John M.
Copyright Year	2009
Description	Joule-Thomson (J-T) devices have been identified as critical components for Thermodynamic Vent Systems (TVS) planned for future space exploration missions. Lee Visco Jets (The Lee Company) (Ref. 4) are one type of J-T device that may be used for LCH4 propellant systems. Visco Jets have been previously tested and characterized in LN2 and LH2 (Refs. 6 and 7), but have not been characterized in LOX or LCH4. Previous Visco Jet tests with LH2 resulted in clogging of the Visco Jet orifice under certain conditions. It has been postulated that this clogging was due to the presence of neon impurities in the LH2 that solidified in the orifices. Visco Jets therefore require testing in LCH4 to verify that they will not clog under normal operating conditions. This report describes a series of tests that were performed at the NASA Glenn Research Center to determine if Visco Jets would clog under normal operating conditions with LCH4 propellant. Test results from this program indicate that no decrease in flow rate was observed for the Visco Jets tested, and that current equation used for predicting flow rate appears to under-predict actual flow at high Lohm ratings.
File Size	2731763
Page Count	18
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090015375
Archival Resource Key	ark:/13960/t4qk2d87z
Language	English
Publisher Date	2009-03-01
Access Restriction	Open
Subject Keyword	Propellants And Fuels Methane Performance Tests Joule-thomson Effect Propulsion System Performance Liquefied Gases Blocking Characterization Thermodynamics Contaminants Vents Orifices Flow Velocity Mass Flow Cryogenic Rocket Propellants Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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