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Accession Number
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N20120003741
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Title
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Simulation of a Cold Gas Thruster System and Test Data Correlation.
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Publication Date
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Feb 2012
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Media Count
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20p
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Personal Author
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D. M. Hauser F. D. Quinn
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Abstract
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During developmental testing of the Ascent Abort 1 (AA-1) cold gas thruster system, unexpected behavior was detected. Upon further review the design as it existed may not have met the requirements. To determine the best approach for modifying the design, the system was modeled with a dynamic fluid analysis tool (EASY5). The system model consisted of the nitrogen storage tank, pressure regulator, thruster valve, nozzle, and the associated interconnecting line lengths. The regulator and thruster valves were modeled using a combination of the fluid and mechanical modules available in EASY5. The simulation results were then compared against actual system test data. The simulation results exhibited behaviors similar to the test results, such as the pressure regulators response to thruster firings. Potential design solutions were investigated using the analytical model parameters, including increasing the volume downstream of the regulator and increasing the orifice area. Both were shown to improve the regulator response.
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Keywords
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Ascent
Cold gas
Data correlation
Mathematical models
Orifices
Pressure
Pressure regulators
Propulsion system performance
Simulation
Thrustors
Time dependence
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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46B - Fluid Mechanics
51A - Aerodynamics
84E - Space Launch Vehicles & Support Equipment
62C - Control Systems & Control Theory
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Corporate Author
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National Aeronautics and Space Administration, Cleveland, OH. NASA John H. Glenn Research Center at Lewis Field.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1220
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Contract Number
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N/A
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