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Turbine-less Ducted Fan Jet Engine Subsonic Propulsion






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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?.
Turbine-less Ducted Fan Jet Engine Subsonic Propulsion

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Turbine less ducted fan jet engine subsonic propulsionSlide 1

Turbine-less Ducted Fan Jet EngineSubsonic Propulsion

Wind Tunnel Team

Long Ly

Garrick Gregory

OverviewSlide 2

Overview

  • Objective

  • Background

    • Turbine Engine

    • Turbine-less Ducted Fan Engine

  • Prototype

  • CFD Analysis

  • Wind Tunnel Testing and Validation

  • Applications

  • Future Objectives

  • Questions?

ObjectiveSlide 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

BackgroundSlide 4

Background

Conventional Turbine engine

Air Inlet

Compressor

Combustion Chamber

Turbine

Nozzle

* Images from NASA – Glenn Research Center

Turbine less ducted fan jet engineSlide 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

Cad modelSlide 6

CAD Model

Adaptor, Stator, Streamline injector

Complete Engine & Wind Tunnel Mounting

Wind Tunnel Engine Mount

Rapid prototypeSlide 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

Turbine less ducted fan jet engine subsonic propulsionSlide 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:

Axisymmetric flowSlide 9

Axisymmetric Flow

Flow Governing Equations (scalar form)

  • Continuity Equation:

  • r Momentum Equation:

  • θ Momentum Equation:

  • z Momentum Equation:

Finite volume methodSlide 10

Finite Volume Method

Taylor Series Expansion

Finite Difference Equations

Turbine less ducted fan jet engine subsonic propulsionSlide 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

Turbine less ducted fan jet engine subsonic propulsionSlide 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

PressureSlide 13

Pressure

  • Pitot Tube

  • Pressure Transducers

*Pitot tube image from NASA – Glenn Research Center

Bernoulli’s Equation:

Static pressure + dynamic pressure = Stagnation pressure

Power inputSlide 14

Power Input

  • Electrical Power Input

    • 2 Digital Multi-meters

      • Voltage

      • Current

+

-

+

+

+

-

Transmitter

Rpm measurementSlide 15

RPM measurement

Impeller rpmsSlide 16

Impeller RPMs

Photo Sensor Tachometer

Laser Tachometer

Strobe Tachometer

Static test voltage inputSlide 17

Static Test – Voltage Input

Test 1

Test 2

Static test power inputSlide 18

Static Test – Power Input

Test 1

Test 2

Static test exit velocitiesSlide 19

Static Test – Exit Velocities

Test 1

Test 2

Static test thrustSlide 20

Static Test - Thrust

Test 1

Test 2

Turbine less ducted fan jet engine subsonic propulsionSlide 21

Nozzle Design

Pi

ṁi

Vi

Pe

ṁe

Ve

Ae

Thrust = F = ṁeVe- ṁiVi+ (Pe-Pi)Ae

ApplicationsSlide 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

Turbine less ducted fan jet engine subsonic propulsionSlide 23

Future Objectives

Complete CFD Analysis

Dynamic Wind Tunnel Testing

Design Nozzle

More Testing

Turbine less ducted fan jet engine subsonic propulsionSlide 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

Turbine less ducted fan jet engine subsonic propulsionSlide 25

?


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