Stamatis, AMathioudakis, KSieros, GThis paper describes an effort to model the performance maps of compressors and turbines (i.e., the relation between mass flow, pressure ratio, and efficiency), using analytical functions. Analytical functions are fitted to the available experimental data using a least-squares-type approach for determining the parameters of the fitting function. The success of using a particular function for an application is assessed through a suitably defined mean error of the model. Apart from presenting the method for setting up these analytical representations, applications to performance modeling and fault diagnosis are discussed. The change in model parameters is used to characterize changes of the engine condition and possibly diagnose occurring faults. The impact of introducing analytical component models into overall engine computer models, replacing a tabulated form of the component maps, is also discussed.http://hdl.handle.net/123456789/1233013674ISI:A1997XW1360001256650748-4658engAMER INST AERONAUT ASTRONAUTJournal of Propulsion and PowerFault diagnosisLeast squares approximationsComputer simulationCompressorsFunctionsMathematical modelsCurve fittingMass transferTurbinesJet enginesJet engine component maps for performance modeling and diagnosisjournalArticle1997Δημοσίευση σε περιοδικόPublication in journalΑεροδιαστημική μηχανικήAerospace Engineeringisi - Engineering, Aerospace includes resources concerned with astronautics, aeronautics, aerospace, and aviation. Topics covered include the design and construction of aircraft, space vehicles, missiles, satellites, instrumentation, and power units, as well as the launch, flight, and guidance of crafts in the earth's atmosphere or in space. Resources in this category draw from many fields, including mechanics and mechanical engineering, automation, instrumentation, and materials science.Επιστημονικό άρθροScientific articleΕθνικό Μετσόβιο ΠολυτεχνείοGreek Aggregator OpenArchives.gr | National Documentation Centre (EKT)other