Turbine-less Ducted Fan Jet Engine
Subsonic Propulsion
Wind Tunnel TeamWind Tunnel TeamLong LyLong Ly
Garrick GregoryGarrick Gregory
Overview
ObjectiveObjectiveBackgroundBackground
Turbine EngineTurbine EngineTurbine-less Ducted Fan EngineTurbine-less Ducted Fan Engine
PrototypePrototypeCFD AnalysisCFD AnalysisWind Tunnel Testing and ValidationWind Tunnel Testing and ValidationApplicationsApplicationsFuture ObjectivesFuture ObjectivesQuestions?Questions?
Objective
To perform simulation, testing, and validation of a conceptual To perform simulation, testing, and validation of a conceptual Turbine-less Ducted Fan Jet Engine design.Turbine-less Ducted Fan Jet Engine design.
Analyze:Analyze:Axial Flow PatternsAxial Flow PatternsPressure DifferencesPressure DifferencesThrust, Performance, and EfficiencyThrust, Performance, and Efficiency
Design:Design:Outlet NozzleOutlet Nozzle
Background
Conventional Turbine engineConventional Turbine engineAir InletAir InletCompressorCompressorCombustion ChamberCombustion Chamber TurbineTurbineNozzleNozzle
* Images from NASA – Glenn Research Center
Turbine-less Ducted Fan Jet Engine
What is a ducted fan?What is a ducted fan?A fan or compressor installed inside a A fan or compressor installed inside a ductduct
Why Turbine-less?Why Turbine-less?No need for a turbine to drive the No need for a turbine to drive the compressorcompressorCompressor is driven by electric motorCompressor is driven by electric motor
Advantages:Advantages:Less fuel consumptionLess fuel consumptionLess expensiveLess expensiveNot difficult to manufactureNot difficult to manufactureSolar panel or fuel cell for electricitySolar panel or fuel cell for electricityHydrogen from fuel cell for Hydrogen from fuel cell for combustioncombustionQuiet propulsion; suitable for Quiet propulsion; suitable for undetected surveillanceundetected surveillance
CAD Model
Adaptor, Stator, Streamline injectorAdaptor, Stator, Streamline injector
Complete Engine & Wind Tunnel MountingComplete Engine & Wind Tunnel Mounting
Wind Tunnel Engine MountWind Tunnel Engine Mount
Rapid Prototype
Adaptor, Stator, Streamline injectorAdaptor, Stator, Streamline injectorComplete Engine & Wind Tunnel MountingComplete Engine & Wind Tunnel Mounting
Wind Tunnel Engine MountWind Tunnel Engine Mount
*High grade plastic for quick prototype and *High grade plastic for quick prototype and aerodynamic testingaerodynamic testing
CFD Analysis
Computational Fluid DynamicsComputational Fluid DynamicsSolidworks /CosmosFloworksSolidworks /CosmosFloworks
Ansys 12.0 / ICEM / FluentAnsys 12.0 / ICEM / Fluent
Navier Stokes EquationsNavier Stokes Equations
Finite Volume MethodFinite Volume Method
Navier-Stokes Flow Governing Equations (General / Vector Form)Navier-Stokes Flow Governing Equations (General / Vector Form)
Continuity Equation:Continuity Equation:
Momentum Equation:Momentum Equation:
Internal Energy:Internal Energy:
Axisymmetric FlowFlow Governing Equations (scalar form)Flow Governing Equations (scalar form)
Continuity Equation:Continuity Equation:
r Momentum Equation:r Momentum Equation:
θ Momentum Equation:θ Momentum Equation:
z Momentum Equation:z Momentum Equation:
Finite Volume Method
Finite Difference EquationsFinite Difference Equations
Taylor Series ExpansionTaylor Series Expansion
CFD Progress
CosmosFloworksCosmosFloworksTechnical DifficultiesTechnical Difficulties
Complex geometry Complex geometry
Software CrashSoftware Crash
Overnight SimulationsOvernight Simulations
Ansys 12.0Ansys 12.0Ease importing geometry from other CAD SoftwareEase importing geometry from other CAD Software
Design Modeler – Parametric Solid ModelingDesign Modeler – Parametric Solid Modeling
Gambit obsoleteGambit obsolete
Replaced with ICEM CFDReplaced with ICEM CFD
Mesh creation slightly differentMesh creation slightly different
CFD Solver - FluentCFD Solver - Fluent
Wind Tunnel Testing
Static TestStatic Test
Subsonic Wind TunnelSubsonic Wind Tunnel
Single axis force transducerSingle axis force transducer
1 pitot tube, 2 pressure transducers1 pitot tube, 2 pressure transducers
T-fitting: dynamic & static pressureT-fitting: dynamic & static pressure
LabVIEW Data AcquisitionLabVIEW Data Acquisition
A Pratt and Whitney turbofan engine for the F-15 Eagle
Pressure
Pitot TubePitot Tube
Pressure TransducersPressure Transducers
*Pitot tube *Pitot tube image from NASA – Glenn Research Centerimage from NASA – Glenn Research Center
Bernoulli’s Equation:Bernoulli’s Equation:Static pressure + dynamic pressure = Stagnation pressureStatic pressure + dynamic pressure = Stagnation pressure
Power Input
Electrical Power InputElectrical Power Input2 Digital Multi-meters2 Digital Multi-meters
VoltageVoltage
CurrentCurrent
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Transmitter
RPM measurement
Impeller RPMsPhoto Sensor TachometerPhoto Sensor Tachometer Laser TachometerLaser Tachometer
Strobe TachometerStrobe Tachometer
Static Test – Voltage Input
Test 1Test 1 Test 2Test 2
Static Test – Power Input
Test 1Test 1 Test 2Test 2
Static Test – Exit Velocities
Test 1Test 1 Test 2Test 2
Static Test - Thrust
Test 1Test 1 Test 2Test 2
Nozzle Design
Applications
High speed UAV’s High speed UAV’s
V/STOL UAV’sV/STOL UAV’s
LADF:LADF: Lift Augmented Ducted Fan;Lift Augmented Ducted Fan;
combines high speed and VTOLcombines high speed and VTOL
Bell X-22AAero-web.org
Future Objectives
Complete CFD AnalysisComplete CFD Analysis
Dynamic Wind Tunnel TestingDynamic Wind Tunnel Testing
Design NozzleDesign Nozzle
More TestingMore Testing
Thank You
AdvisorsDr. Boussalis
Dr. Wu
Dr. Guillaume
Dr. Pham
SupportNhan Doan
Solomon Yitagesu
Yacine Sahnoun
Shing Chan
Johanna Lopez
Sara Esparza
Roland Chen
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