Implementation of active flow control using microjets on an rc aircraft
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Implementation of Active Flow Control using Microjets on an RC Aircraft. Dan Drake Phil Kreth Hussein Nabulsi Matt Tubtim Faculty Advisor: Dr. Farrukh Alvi Sponsor: Dr. Gregg Abate (Eglin AFB). Background. Flow separated ~16° AOA. Reattached flow ~ 5 psig @ microjets. Flow Separation.

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Implementation of Active Flow Control using Microjets on an RC Aircraft

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Implementation of active flow control using microjets on an rc aircraft

Implementation of Active Flow Control using Microjets on an RC Aircraft

Dan Drake

Phil Kreth

Hussein Nabulsi

Matt Tubtim

Faculty Advisor: Dr. Farrukh Alvi

Sponsor: Dr. Gregg Abate (Eglin AFB)


Background

Background

Flow separated ~16° AOA

Reattached flow ~ 5 psig @ microjets

Flow Separation

04.03.2008


Motivation

Motivation

  • ONERA D Airfoil

  • Span = 1 m, Chord = 0.35

  • U= 45 m/s,  = 14

  • Control applied to 40% of span

Flow with Control

Baseline flow

*Conducted at the Université de Poitiers, France

Images & Video Courtesy of Dr. Farrukh Alvi

04.03.2008


Motivation1

Motivation

20-30% gain in CL

Control applied to 40% of span

Images Courtesy of Dr. Farrukh Alvi

04.03.2008


Needs assessment

Needs Assessment

Implement microjets on RC Airplane

Remotely activate each wing

Run time should be 30 secs or more

Delay stall and improve lift

Use off-the-shelf items only

Budget = $1,50000

04.03.2008


Wind tunnel testing

Wind Tunnel Testing

04.03.2008

  • Paint Testing

    • Uncertainty in interpretation

  • Smoke Wire

    • Minimum WT speed too high

  • Tuft Testing

    • Success


Flow reattachment video

Flow Reattachment Video

04.03.2008


Air supply method

Air Supply Method


Air supply method1

Air Supply Method


Performance measurements

Performance Measurements


Final design schematic

Final Design Schematic

04.03.2008


Actual design

Actual Design

04.03.2008


Final design components

Final Design Components

Overhead View

Close-up view:

Tank

Regulator

Valves

04.03.2008


Implementation of active flow control using microjets on an rc aircraft

High Pressure Tank Location

04.03.2008


Implementation of active flow control using microjets on an rc aircraft

Shielding for High Pressure Cylinder

04.03.2008


Implementation of active flow control using microjets on an rc aircraft

Pressure Manifolds and Microjets in Wing

to microjets

from valves

04.03.2008


Budget weight

Budget & Weight

Added Weight: 10 lbs

Total Weight: 14 lbs

04.03.2008


Test plan

Test Plan

  • Video aircraft on ground

    • Show all systems in working order

  • Flight testing, no control

  • Flight testing, with control

    • Acquire video from on-board camera

04.03.2008


Flight test goals

Flight Test Goals

Don’t crash!

Demonstrate reattachment

04.03.2008


Flight test video

Flight Test Video

04.03.2008


Outcomes conclusions

Outcomes & Conclusions

  • System was successful

    • No “bad landings”

    • Microjets remotely activated

    • Reattached flow demonstrated

  • Proposed Future Work

    • Demonstrate Roll Control

    • Measure CL and CD improvements

04.03.2008


Special thanks

Special Thanks

  • Eglin Air Force Base

    • Dr. Gregg Abate

  • AAPL – FAMU-FSU

    • Dr. Farrukh Alvi

  • Mechanical Engineering Dept

    • Dr. Cesar Luongo

    • Mr. Jon Cloos

04.03.2008


Questions and comments

Questions and Comments

04.03.2008


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