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Overview of NASA GRCs Green Propellant Infusion Mission Thruster Testing and Plume DiagnosticsThe Green Propellant Infusion Mission (GPIM) is sponsored by NASA's Space Technology Mission Directorate (STMD) Technology Demonstration Mission (TDM) office. The goal of GPIM is to advance the technology readiness level of a green propulsion system, specifically, one using the monopropellant, AF-M315E, by demonstrating ground handling, spacecraft processing, and on-orbit operations. One of the risks identified for GPIM is potential contamination of sensitive spacecraft surfaces from the effluents in the plumes of AF-M315E thrusters. NASA Glenn Research Center (GRC) is conducting activities to characterize the effects of AF-M315E plume impingement and deposition. GRC has established individual plume models of the 22-N and 1-N thrusters that will be used on the GPIM spacecraft. The models describe the pressure, temperature, density, Mach number, and species concentration of the AF-M315E thruster exhaust plumes. The models are being used to assess the impingement effects of the AF-M315E thrusters on the GPIM spacecraft. The model simulations will be correlated with plume measurement data from Laboratory and Engineering Model 22-N, AF-M315E thrusters. The thrusters will be tested in a small rocket, altitude facility at NASA GRC. The GRC thruster testing will be conducted at duty cycles representatives of the planned GPIM maneuvers. A suite of laser-based diagnostics, including Raman spectroscopy, Rayleigh spectroscopy, Schlieren imaging, and physical probes will be used to acquire plume measurements of AFM315E thrusters. Plume data will include temperature, velocity, relative density, and species concentration. The plume measurement data will be compared to the corresponding simulations of the plume model. The GRC effort will establish a data set of AF-M315E plume measurements and a plume model that can be used for future AF-M315E applications.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Deans, Matthew C.
(NASA Glenn Research Center Cleveland, OH United States)
Reed, Brian D.
(NASA Glenn Research Center Cleveland, OH United States)
Yim, John T.
(NASA Glenn Research Center Cleveland, OH United States)
Arrington, Lynn A.
(NASA Glenn Research Center Cleveland, OH United States)
Williams, George J.
(Ohio Aerospace Inst. Cleveland, OH, United States)
Kojima, Jun J.
(Ohio Aerospace Inst. Cleveland, OH, United States)
McLean, Christopher H.
(Ball Aerospace and Technologies Corp. Boulder, CO, United States)
Date Acquired
August 6, 2014
Publication Date
May 19, 2014
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
Meeting Information
Meeting: Space Propulsion 2014
Location: Cologne
Country: Germany
Start Date: May 19, 2014
End Date: May 22, 2014
Sponsors: European Space Agency, Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), 3AF - Association of Aeronautics and Astronautics, Centre National d'Etudes Spatiales
Funding Number(s)
WBS: WBS 878336.
Distribution Limits
Public Use Permitted.
green Propellants
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