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Large liquid rocket engine transient performance simulation systemPhase 1 of the Rocket Engine Transient Simulation (ROCETS) program consists of seven technical tasks: architecture; system requirements; component and submodel requirements; submodel implementation; component implementation; submodel testing and verification; and subsystem testing and verification. These tasks were completed. Phase 2 of ROCETS consists of two technical tasks: Technology Test Bed Engine (TTBE) model data generation; and system testing verification. During this period specific coding of the system processors was begun and the engineering representations of Phase 1 were expanded to produce a simple model of the TTBE. As the code was completed, some minor modifications to the system architecture centering on the global variable common, GLOBVAR, were necessary to increase processor efficiency. The engineering modules completed during Phase 2 are listed: INJTOO - main injector; MCHBOO - main chamber; NOZLOO - nozzle thrust calculations; PBRNOO - preburner; PIPE02 - compressible flow without inertia; PUMPOO - polytropic pump; ROTROO - rotor torque balance/speed derivative; and TURBOO - turbine. Detailed documentation of these modules is in the Appendix. In addition to the engineering modules, several submodules were also completed. These submodules include combustion properties, component performance characteristics (maps), and specific utilities. Specific coding was begun on the system configuration processor. All functions necessary for multiple module operation were completed but the SOLVER implementation is still under development. This system, the Verification Checkout Facility (VCF) allows interactive comparison of module results to store data as well as provides an intermediate checkout of the processor code. After validation using the VCF, the engineering modules and submodules were used to build a simple TTBE.
Document ID
19910015027
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Mason, J. R.
(Pratt and Whitney Aircraft West Palm Beach, FL, United States)
Southwick, R. D.
(Pratt and Whitney Aircraft West Palm Beach, FL, United States)
Date Acquired
September 6, 2013
Publication Date
July 25, 1989
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
FR-20282-3
NAS 1.26:183780
NASA-CR-183780
Accession Number
91N24340
Funding Number(s)
CONTRACT_GRANT: NAS8-36994
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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