Accession Number : ADP004553

Title :   Minimizing Plume Contamination Production in Bipropellant Thrusters,

Corporate Author : ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV

Personal Author(s) : DeGaetano,E. A. ; Webber,W. T.

Report Date : OCT 1984

Pagination or Media Count : 9

Abstract : Under a 1-year funded by the International Telecommunication Satellite Organization, the Rocketdyne Division of Rockwell International designed, fabricated, and tested a full-scale, advanced, storable, pressure-fed thruster for blowdown operation in the 1-lbf thrust range. The purpose of the program was a full-scale technology demonstration of an engine appropriate for use as a satellite station-keeping and attitude-control thruster. The primary features of the thruster are high performance, reduced plume contaminant production, and long life. Using nitrogen tetroxide and monomethyl-hydrazine, the thruster operates at 50 psia chamber pressure and produces a nominal vacuum specific impulse of 300 seconds with a 150:1 nozzle expansion ratio. The thruster chamber is made of beryllium and is radiation cooled. Reduction of the plume contaminant is accomplished by providing improved propellant evaporation for high combustion efficiency and by reduction of thruster propellant dribble volumes.

Descriptors :   *THRUSTERS, *LIQUID PROPELLANT ROCKET ENGINES, *BIPROPELLANTS, *EMISSION CONTROL, ROCKET EXHAUST, EXHAUST PLUMES, BLOWDOWN, ARTIFICIAL SATELLITES, STATIONKEEPING, ATTITUDE CONTROL SYSTEMS, PERFORMANCE(ENGINEERING), LONG LIFE, EVAPORATION, SYMPOSIA

Distribution Statement : APPROVED FOR PUBLIC RELEASE