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Turbine-less Ducted Fan Jet Engine Subsonic Propulsion

Turbine-less Ducted Fan Jet Engine Subsonic Propulsion. Wind Tunnel Team Long Ly Garrick Gregory. Overview. Objective Background Turbine Engine Turbine-less Ducted Fan Engine Prototype CFD Analysis Wind Tunnel Testing and Validation Applications Future Objectives Questions?.

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Turbine-less Ducted Fan Jet Engine Subsonic Propulsion

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  1. Turbine-less Ducted Fan Jet EngineSubsonic Propulsion Wind Tunnel Team Long Ly Garrick Gregory

  2. Overview • Objective • Background • Turbine Engine • Turbine-less Ducted Fan Engine • Prototype • CFD Analysis • Wind Tunnel Testing and Validation • Applications • Future Objectives • Questions?

  3. Objective • To perform simulation, testing, and validation of a conceptual Turbine-less Ducted Fan Jet Engine design. • Analyze: • Axial Flow Patterns • Pressure Differences • Thrust, Performance, and Efficiency • Design: • Outlet Nozzle

  4. Background Conventional Turbine engine Air Inlet Compressor Combustion Chamber Turbine Nozzle * Images from NASA – Glenn Research Center

  5. Turbine-less Ducted Fan Jet Engine • What is a ducted fan? • A fan or compressor installed inside a duct • Why Turbine-less? • No need for a turbine to drive the compressor • Compressor is driven by electric motor • Advantages: • Less fuel consumption • Less expensive • Not difficult to manufacture • Solar panel or fuel cell for electricity • Hydrogen from fuel cell for combustion • Quiet propulsion; suitable for undetected surveillance

  6. CAD Model Adaptor, Stator, Streamline injector Complete Engine & Wind Tunnel Mounting Wind Tunnel Engine Mount

  7. Rapid Prototype *High grade plastic for quick prototype and aerodynamic testing Adaptor, Stator, Streamline injector Complete Engine & Wind Tunnel Mounting Wind Tunnel Engine Mount

  8. CFD Analysis Computational Fluid Dynamics • Solidworks/CosmosFloworks • Ansys 12.0 / ICEM / Fluent • Navier Stokes Equations • Finite Volume Method Navier-Stokes Flow Governing Equations (General / Vector Form) • Continuity Equation: • Momentum Equation: • Internal Energy:

  9. Axisymmetric Flow Flow Governing Equations (scalar form) • Continuity Equation: • r Momentum Equation: • θ Momentum Equation: • z Momentum Equation:

  10. Finite Volume Method Taylor Series Expansion Finite Difference Equations

  11. CFD Progress • CosmosFloworks • Technical Difficulties • Complex geometry • Software Crash • Overnight Simulations • Ansys 12.0 • Ease importing geometry from other CAD Software • Design Modeler – Parametric Solid Modeling • Gambit obsolete • Replaced with ICEM CFD • Mesh creation slightly different • CFD Solver - Fluent

  12. Wind Tunnel Testing • Static Test • Subsonic Wind Tunnel • Single axis force transducer • 1pitot tube, 2 pressure transducers • T-fitting: dynamic & static pressure • LabVIEW Data Acquisition A Pratt and Whitney turbofan engine for the F-15 Eagle

  13. Pressure • Pitot Tube • Pressure Transducers *Pitot tube image from NASA – Glenn Research Center Bernoulli’s Equation: Static pressure + dynamic pressure = Stagnation pressure

  14. Power Input • Electrical Power Input • 2 Digital Multi-meters • Voltage • Current + - + + + - Transmitter

  15. RPM measurement

  16. Impeller RPMs Photo Sensor Tachometer Laser Tachometer Strobe Tachometer

  17. Static Test – Voltage Input Test 1 Test 2

  18. Static Test – Power Input Test 1 Test 2

  19. Static Test – Exit Velocities Test 1 Test 2

  20. Static Test - Thrust Test 1 Test 2

  21. Nozzle Design Pi ṁi Vi Pe ṁe Ve Ae Thrust = F = ṁeVe- ṁiVi+ (Pe-Pi)Ae

  22. Applications Bell X-22A Aero-web.org High speed UAV’s V/STOL UAV’s LADF:Lift Augmented Ducted Fan; combines high speed and VTOL

  23. Future Objectives Complete CFD Analysis Dynamic Wind Tunnel Testing Design Nozzle More Testing

  24. Thank You Advisors Dr. Boussalis Dr. Wu Dr. Guillaume Dr. Pham Support Nhan Doan Solomon Yitagesu Yacine Sahnoun Shing Chan Johanna Lopez Sara Esparza Roland Chen

  25. ?

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