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航空动力装置12发动机特性.ppt

发布：2025-04-12约3.1千字共27页下载文档

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GasTurbine

Aero-engineByZhaoTingyuThermalenergyandpowerengineeringstaffsection

CompanyLogoEngineperformanceEnginePerformanceEngineCharacteristicsEngineThrust-settingParameterEfficienciesEngineOperationandMonitoringTakeoffThrustSetting

CompanyLogoEngineThrust-settingParameterEnginePressureRatio(EPR)

CompanyLogoEngineThrust-settingParameterEngineRPM

CompanyLogoEngineCharacteristicsEffectofEngineRPMChanges(SpeedCharacteristic)

CompanyLogoEngineCharacteristicsEffectsofAltitudeChanges(AltitudeCharacteristic)

CompanyLogoEngineCharacteristics

CompanyLogoEngineCharacteristicsEffectsofAircraftForwardSpeedChanges(VelocityCharacteristic)

CompanyLogoEngineCharacteristics

CompanyLogoEngineCharacteristicsEffectsofTemperatureChanges

CompanyLogoEngineCharacteristicsEffectsofbleedair

CompanyLogoEngineCharacteristicsEffectsofbleedairThebleedingofairfromthecompressor★reducestheamountofmassairflow★decreasingthrust/rpm,increasing★exhaustgastemperatureandspecificfuelconsumption★improveitsworkingstability

CompanyLogoEfficienciesInternalefficiencyThethermalefficiencyspecifiestheenergylossestotheatmosphereduetoexhaustgasheat:

EfficienciesThequalitycoefficienttheworkinglossesoftherealgasturbine:Theinternalefficiencyexpressesthequalityofajetengineasaheatengine.Itspecifiesthepercentageoffuelenergyinputwhichisconvertedintokineticenergyofthegasstream.

EfficienciesPropulsionefficiencyTheefficiencyofconversionofkineticenergytopropulsiveworkistermedthepropulsiveorexternalefficiencyandisaffectedbytheamountofkineticenergywastedbythepropellingmechanism.

EfficienciesEnginepropulsionefficiencies

CompanyLogoEngineOperationandMonitoringEngineRegimesMaximumtake-offthrustMaximumgo-aroundthrustMaximumcontinuousthrustMaximumclimbthrustMaximumcruisethrustIdle

CompanyLogoEngineOperation

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