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A hierarchy for modeling high speed propulsion systemsGeneral research efforts on reduced order propulsion models for control systems design are overviewed. Methods for modeling high speed propulsion systems are discussed including internal flow propulsion systems that do not contain rotating machinery such as inlets, ramjets, and scramjets. The discussion is separated into four sections: (1) computational fluid dynamics model for the entire nonlinear system or high order nonlinear models; (2) high order linearized model derived from fundamental physics; (3) low order linear models obtained from other high order models; and (4) low order nonlinear models. Included are special considerations on any relevant control system designs. The methods discussed are for the quasi-one dimensional Euler equations of gasdynamic flow. The essential nonlinear features represented are large amplitude nonlinear waves, moving normal shocks, hammershocks, subsonic combustion via heat addition, temperature dependent gases, detonation, and thermal choking.
Document ID
19920013249
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Hartley, Tom T.
(Akron Univ. Akron, OH, United States)
Deabreu, Alex
(Akron Univ. Akron, OH, United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Improved Large Perturbation Propulsion Models for Control Syste
Subject Category
Aircraft Propulsion And Power
Accession Number
92N22492
Funding Number(s)
CONTRACT_GRANT: NAG3-904
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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