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

++

--

++

++

++

--

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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