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The effects of finite rate chemical processes on high enthalpy nozzle performance - A comparison between SPARK and SEAGULLThe generalized chemistry version of the computer code SPARK is extended to include two higher-order numerical schemes, yielding fourth-order spatial accuracy for the inviscid terms. The new and old formulations are used to study the influences of finite rate chemical processes on nozzle performance. A determination is made of the computationally optimum reaction scheme for use in high-enthalpy nozzles. Finite rate calculations are compared with the frozen and equilibrium limits to assess the validity of each formulation. In addition, the finite rate SPARK results are compared with the constant ratio of specific heats (gamma) SEAGULL code, to determine its accuracy in variable gamma flow situations. Finally, the higher-order SPARK code is used to calculate nozzle flows having species stratification. Flame quenching occurs at low nozzle pressures, while for high pressures, significant burning continues in the nozzle.
Document ID
19880057544
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Carpenter, M. H.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1988
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
AIAA PAPER 88-3157
Accession Number
88A44771
Funding Number(s)
CONTRACT_GRANT: NAS1-18599
Distribution Limits
Public
Copyright
Other

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