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A Matlab-Based Graphical User Interface for Simulation and Control Design of a Hydrogen MixerA Graphical User Interface (GUI) that facilitates prediction and control design tasks for a propellant mixer is described. The Hydrogen mixer is used in rocket test stand operations at the NASA John C. Stennis Space Center. The mixer injects gaseous hydrogen (GH2) into a stream of liquid hydrogen (LH2) to obtain a combined flow with desired thermodynamic properties. The flows of GH2 and LH2 into the mixer are regulated by two control valves, and a third control valve is installed at the exit of the mixer to regulate the combined flow. The three valves may be simultaneously operated in order to achieve any desired combination of total flow, exit temperature and mixer pressure within the range of operation. The mixer, thus, constitutes a three-input, three-output system. A mathematical model of the mixer has been obtained and validated with experimental data. The GUI presented here uses the model to predict mixer response under diverse conditions.
Document ID
20040013423
Acquisition Source
Stennis Space Center
Document Type
Conference Paper
Authors
Richter, Hanz
(NASA Stennis Space Center Stennis Space Center, MS, United States)
Figueroa, Fernando
(NASA Stennis Space Center Stennis Space Center, MS, United States)
Date Acquired
August 21, 2013
Publication Date
July 20, 2003
Subject Category
Computer Programming And Software
Report/Patent Number
SE-2003-11-00100-SSC
Funding Number(s)
CONTRACT_GRANT: NAS13-99027
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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