English

Noun

pressurant ‎(plural pressurants)

1. A gas used to drive a fluid through a fluid system.
   • The helium pressurant supplies the energy for the propellant transport from the tanks to the combustion chamber.^[1]
   • During tank pressurization under some circumstances, rapid mixing of relatively warm pressurant gas with cryogenic propellant can lead to rapid densification of the gas and loss of pressure in the tank.^[2]

References

1. ↑ http://www.dtic.mil/dtic/tr/fulltext/u2/a013774.pdf Schneider, D.A., Air Force Weapons Laboratory Report AFWL-TR-74-270, June 1975.
2. ↑ http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20070003730_2007003015.pdf Ahuja, V, et. al, Runtime and Pressurization Analyses of Propellant Tanks, Abstract, July 2007.

French

Verb

pressurant

1. present participle of pressurer